Fortnite is a free-to-play battle royale game that has a system of in-game currency called V-Bucks that can be used to buy cosmetic items, battle passes, and other perks.
League of Legends is a free-to-play multiplayer online battle arena game that has a system of in-game currency called Riot Points that can be used to buy champions, skins, and other features.
Candy Crush Saga is a free-to-play puzzle game that has a system of in-game currency called Gold Bars that can be used to buy extra moves, lives, boosters, and other advantages.
Roblox is a free-to-play online platform that allows users to create and play games of various genres. It has a system of in-game currency called Robux that can be used to buy items, accessories, and game passes.
Among Us is a free-to-play social deduction game that has a system of in-game purchases that can be used to buy cosmetic items, pets, and skins.