The creator of Blue Lock: Rivals thought kids on Roblox might like a soccer video game with an anime vibe. It sold a few months later for more than $3 million. The 19-year-old, who asked that his name ...

Misbehavior on digital platforms can be tricky to manage. Issue warnings, and you risk not deterring bad behavior. Block too readily, and you might drive away your user base and open yourself to ...