There are a few ways to do it. As one mentioned, trading of in-game assets. Additionally, some games want to become “Play to Earn”. Essentially the more you play their game, the more buttcoin (made-up coin to use for this conversation) you earn which then you can trade somewhere for real money. It’s like when you play CSGO for years and end up with 350 dollars in steam from selling all those free cases they just give you at the end of a match so you end up buying a steam deck for essentially free… So going back to blockchain, essentially, actions in a game can get you more or less coins. Like you are playing a buttcoin miner.
So I’ve seen a few storefronts try to implement this for all games in their store. That way if you play a game, you earn buttcoin, take that buttcoin to buy a new game.
Utsumi is right though. Buttcoin implementations will not make a game more or less boring. It’s an economy system implementation and most people don’t find the economy as a fun thing.