Roblox has broken the record for the most concurrent users on a platform. And it’s all thanks to two huge games.

Roblox (NYSE: RBLX) dropped 4.2% amid a renewed short call from The Bear Cave. The new Bear Cave short report makes claims about potential child abuse on the gaming platform.

Bear Cave also highlights problems with Robux, the in-game currency for Roblox. The report alleges that Roblox users are being encouraged to commit ad fraud and gambling activities to earn free Robux.