its been done before i know its possible
the idea is like, you get a pickaxe which you mine specified blocks and it will give you x amount of bitcoin like .0000001 each time and lets say 1 btc is 40k so you sell they btc you mined to get a better pickaxe which will give more btc, and theres something like gpus and cpus you can buy for money which lets say can give you a 1.2x bonus btc while mining for example. i did a bad time explaining it but i hope you get the idea.
he didnt want $15 for that, he wants $15 because he did bug fixes add suggestions, ECT, cristaf your just a dumbass, you've just lost a player and i bet other people will stop playing because i wont wanna support people who abuse their staff.