Words!
Instead of a single purchase per hour, increase the stock/availability/max purchaseable coins per hour in playtime.
#Gacha coin purchase limit calculation change
inner cairn
rustic crypt
As someone who absolutely hates gachas, I approve whole-heartedly. I stopped caring about dex completion when I found out I had to deal with a real-life timer in an idle game so I can buy a currency from a shop to spend in a fake gacha. It's my own personal hell.