Of the 1,105 TikTok videos the publication reviewed, 778 appeared to show someone placing a bet — but a closer look reportedly revealed that none of the latter featured the actual Polymarket website, instead using dummy sites made to look like the real thing.

For more than half of the videos that appeared to show winning bets, those bets would in reality have been losses, The Wall Street Journal reports. The publication spoke to creators who worked with Polymarket and viewed materials they say they were given to ensure their videos were convincing and engaging. In addition, Polymarket reportedly also enlisted a “social-media army” to repost these videos and help them go viral.