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, the ever-growing plant has blossomed into a haven for content creators, because of the new DevEx Program. Simply put, Robux (in-game currency) can be spent as well as earned in the game.

Roblox is going public after a blockbuster year. Here's how and why it paid out more than $328.74 million to its largely teenage developer community last year.