Looks like https://getcode.com/ just launched to solve this problem. There have been many attempts at web3 micropayments, but this one seems slicker than most. Hat tip from USV, one of their investors.
> Privacy taken too far, however, can lead to bad outcomes. To mitigate the potential of Code being used for nefarious activity, Code users are limited to $250 USD per payment, up to $1000 USD per day.
This is a joke. Everything seems to be designed around their proprietary app, so why bother with a blockchain and custom currency at all?