Yeah, gacha games use a stamina system so you get X amount of energy to spend per day, and then usually have some kind of reserve items which regenerate stamina. And if you want more past that then you need to use premium currency to refresh it.
That makes it so that you have people keep coming back to the game each day as a habit so they aren't wasting energy, and getting a bit of money from the whales who don't care about how much they spend.
Otherwise you might have a mode that requires currency to enter, like Hearthstone's arena. Where if you do well you can earn back your currency, but if you do poorly then you go negative.
Yeah, gacha games use a stamina system so you get X amount of energy to spend per day, and then usually have some kind of reserve items which regenerate stamina. And if you want more past that then you need to use premium currency to refresh it.
That makes it so that you have people keep coming back to the game each day as a habit so they aren't wasting energy, and getting a bit of money from the whales who don't care about how much they spend.
Otherwise you might have a mode that requires currency to enter, like Hearthstone's arena. Where if you do well you can earn back your currency, but if you do poorly then you go negative.