The 25-year-old boasts more than a million subscribers on YouTube plus 5.
Some claim she has been reposting the same photos they have already seen on her Instagram and Twitter profiles free of charge.
A few months ago, Kopf told Fortnite streamer Clix that she was earning six figures a month from her regular revenue outlets, meaning that Kopf just might be one of the most profitable current online figures.
But Kopf is facing backlash from disappointed fans.
OnlyFans is a content-sharing platform famous among sex workers and other creators posting raunchy images and videos where they can earn money from users who subscribe to their content.