YouTuber and Roblox content creator going by the handle “Schlep” was recently banned from the platform after he took matters into his own hands, catching predators Chris Hansen-style.

The company is adding avatar-based, 3D video chat to its virtual world in an effort to expand its audience—and to keep the kids around as they grow older.

Roblox is a popular gaming creation platform that sees millions of users playing daily. So what is Roblox, and why is it always thriving?