Ecash stuff. Can’t show it yet cuz this is an alt

I have a question - how many mints will be fee free? At least for 1-10 proof swaps? My site really benefits from not charging the user mint fees with every transaction. The user “overpays” then get a refund for unused compute, but that can generate two fees. If my service is 1 sat, they get charged 3 total and the mint gets two.

Maybe I’m in the wrong business and should have opened a mint 😉. But really… using a few free mint is crustal for making my product work. Thoughts?