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

Roblox might still be a good investment for patient investors, but it probably won't become a millionaire-maker within the next decade.

Roblox might still be a good investment for patient investors, but it probably won't become a millionaire-maker within the next decade.