Ethan Gawronski was about 10 years old when he discovered Roblox. He dove into its games, mostly to socialize with other kids. Now, at age 20, Gawronski has his own Roblox game that he works on full ...

Roblox’s second-biggest expense, behind developer fees, is infrastructure, privacy and safety. Those costs jumped 69 percent last year to $264.2 million. Alexander Hicks, developer of the role-playing ...