Miners create their own little boys club and promise to secure the Bitcoin in that club and while they hold on to the funds they unlock the funds for users on a side chain or side chains where you can go nuts, change the protocols and add whatever features you like, they secure the blocks and earn fees on those side chains too, and they manage the funds that go in and out of those side chains, while money can go into the boys club easy, it takes months to be pulled out

Miners can collude and rug you if they want to but the incentive to bag more fees throguh chains with more throughput is meant to keep them hoenst