YouTube 'Backdoor Advertising': Why Has It Remained Unchecked Until Now?

I saw ‘YouTube ads’ trending on portal search engines this morning and wondered what it was about. It turned out to be an announcement that the Financial Supervisory Service (FSS) and the Korea Financial Investment Association (KOFIA) are significantly strengthening regulations on YouTube advertisements by securities firms and asset management companies. While headlines like “Dividends like clockwork monthly rent” catching my eye, the truly noteworthy part of this announcement wasn’t just the regulatory language, but the fact that ‘in-house channel YouTube advertisements’ were included in the review scope for the first time. I looked into why this had been excluded until now, and it turns out there were structural reasons.

What Exactly Was Announced Today?

The FSS and KOFIA gathered compliance officers and Chief Consumer Officers (CCOs) from over 70 financial investment firms to explain the ‘Comprehensive Improvement Plan for Financial Investment Company Advertising.’ There are three key points. First, a new ‘Advertising Committee’ involving industry, consumer groups, and the media will be established within KOFIA to set advertising policies. Second, video advertisements produced by firms for their own YouTube channels—such as those for newly listed ETFs or high-risk financial investment products—will now be subject to association review. Third, new criteria for imposing penalties on advertising violations will be established. Additionally, for ‘backdoor advertising’ involving celebrities or channel operators—where economic interests aren’t disclosed when promoting specific products—step-by-step checklists and mandatory pre-reviews will be clarified from contract to post-management. Implementation is set for January next year, accounting for preparation time for firms and the association.

Why Were In-House Channels Excluded?

Until now, KOFIA’s advertising reviews covered media advertisements like newspapers and television, or standardized advertisements registered with the association. However, video content on YouTube channels operated by the firms themselves remained outside this review net. It may seem like an odd loophole, but when these regulations were first designed, they assumed ‘advertising’ would take a clear, distinct form, like a newspaper spread or a TV commercial. Market analysis or product introduction videos on company-run YouTube channels have blurred boundaries. Content that is ambiguous—whether it’s information or advertising—has been circulating freely in this regulatory blind spot. This is why the new improvement plan aims to resolve the discrepancies in self-review standards that previously varied from firm to firm.

‘Cloaking’: How to Bypass Filters

However, regulatory blind spots aren’t limited to official company ads. More serious is the tactic used by fraud rings to bypass YouTube’s automated ad review system itself. This technique, known as ‘cloaking,’ works like this: Fraudsters first create a perfectly normal investment education video and submit it to YouTube for ad review. Once approved, they immediately swap the video content with fraudulent messaging, or keep the video as is but instantly replace the landing page link with a scam chat room address. They add targeting techniques, exposing the ad only to specific countries or age groups to evade monitoring personnel. Since the video at the time of approval differs from what the actual viewer sees, the system is designed to be breached by exploiting this time gap, no matter how tight the automated filter is.

Why this method works so well is tied to how the YouTube algorithm functions. Once an ad starts running, the algorithm spreads it by continuously recommending similar content to viewers who have shown interest in finance. Once approved, the algorithm automatically distributes it to target viewers without needing manual intervention. In fact, a reading-room scam organization based in Cambodia was caught last June for stealing 9.9 billion won from 59 people over two years by posting consultation links in the comment sections of real stock experts’ YouTube channels. The typical modus operandi involved building trust through free investment information, then making victims install fake trading apps, and disappearing with various excuses when they requested withdrawals.

Korea Has Punishment Rules, But the Targets Are Different

It’s not that Korea lacks relevant punishment regulations. The Capital Markets Act, revised in 2024, brought online interactive channels like open chat rooms and Telegram, used for paid membership stock ‘reading rooms,’ under the category of investment advisory services for regulation. Providing specific buy/sell timing for a fee without registration can lead to up to 3 years in prison or a fine of up to 100 million won. Pledging principal protection or guaranteed returns, as well as false or exaggerated advertising, are also prohibited. If the damage exceeds 500 million won, the Act on the Aggravated Punishment, etc. of Specific Economic Crimes applies, leading to harsher sentences.

The problem is that these regulations target ‘reading room operators,’ not ‘how ads are exposed and spread on YouTube platforms,’ as the new improvement plan does. In other words, while the legal basis to punish fraud rings once caught exists, how many people are exposed to the ads before they are filtered out is an entirely different issue. Statistics showing that the FSS inspected 721 similar investment advisory firms and uncovered illegal activities at 58 of them prove that post-facto detection is ongoing. The catch is that by the time they are caught, significant harm has already been done. Ultimately, the effectiveness depends on combining measures that address the ‘pre-exposure stage,’ like today’s announcement, with existing ‘post-detection punishment’ measures.

The UK Goes as Far as Criminal Prosecution

This issue of finfluencer regulation isn’t unique to Korea. The UK’s Financial Conduct Authority (FCA) has been tackling this in earnest since 2024. After releasing final guidelines on social media financial advertising in March 2024, they charged 9 individuals, including several reality TV stars, in May of the same year for promoting unauthorized foreign exchange and contract for difference (CFD) products. In June 2025, they conducted an ‘International Joint Enforcement Week’ with regulators from 8 countries, including Australia, Canada, and Hong Kong, resulting in 3 arrests, 3 criminal charges, 7 cease-and-desist letters, 50 warning notices, and over 650 requests to remove social media content. In the first half of 2026, a second joint operation involving 17 countries expanded the scale, and one reality TV star admitted to illegal financial promotion. Interestingly, the FCA didn’t just conduct this within its own borders; it designed the enforcement as an international cooperation effort from the start. The awareness is that social media ads cross borders, and if regulations differ by country, it’s hard to stop fraud rings from moving to jurisdictions with lax rules.

What makes the UK fundamentally different is the level of punishment. In the UK, promoting unauthorized financial products is classified as a criminal offense, punishable by up to two years in prison, a fine, or both. The specific penalty amounts or whether criminal charges will apply under Korea’s new criteria haven’t been revealed, but the UK case shows that ‘how painfully one is punished when caught’ is just as much a variable for effectiveness as ‘how advertising reviews are strengthened.’ In fact, a professor of media and advertising has pointed out that the most certain measure to break the problem where platform negligence maintains profit structures is the introduction of punitive fines based on revenue.

The Remaining Homework

This improvement plan targets two main areas: the tone of formal advertisements created by firms, and the practice of hiding economic interests like ‘backdoor ads.’ Both are important, but the cloaking tactics or reading-room scams we looked at are crimes committed by unlicensed operators outside the regulatory scope of ‘financial investment companies.’ Refining the ad copy of official firms is a different layer of the problem than fraud rings piercing YouTube’s automated review system. While this plan is a clear step forward in tightening the first layer, the second layer—the fundamental structure where the platform’s automated system is vulnerable to time-gap attacks—will ultimately depend on the cooperation of platform operators like YouTube. Even if regulators create perfectly crafted checklists, if they cannot block that short time gap between approval and actual exposure, the same tactics will inevitably repeat.

Personally, reading this article, something else caught my attention. It’s intuitively clear why phrases like “Dividends like clockwork monthly rent” are problematic. However, many of the people who fall for such phrases often already have some level of wariness regarding reading rooms or fraudulent investment apps. This is what makes cloaking so terrifying. Because the first video they see is ’normal investment education,’ viewers believe they are watching content that has already passed verification once. Once that trust is built, and the landing page changes, they may find it easier to accept proposals they would normally be suspicious of. Perhaps what regulation needs to block isn’t each individual ad phrase, but the very process by which this trust is formed. Next time you see an investment-related video on YouTube, I think it’s worth being suspicious at least once about whether the content is the same as it was when it was first approved.