it's not just not trivial, it's quite cumbersome. but micropayments exist. assume I made some content and users wanted to give me 10 cents for it. if they didn't want to pay the 30 cent visa tax, they'd have to: create a Coinbase account, fund it, buy some crypto, install a wallet, move the crypto to the wallet, and connect the wallet to my website, before finally sending 10 cents my way. even if we handwave that the server side exists, how many users are going to bounce off of that?