Well, the problem is that it's still just a little bit too hard to implement. In-person, it was always easy to just have a coffee can labelled "Tips"... back when we had jingly pocket money to throw around, at least. We've lost that with the move to digital currency, and nothing has quite brought back the anonymous ease of just tossing a loonie in a jar for someone, whether it's the barista, a busker, or a homeless person.

On the web, he mentions that a micropayment platform that solves the Sign In problem would be useful... well, Sign In with Ethereum / Metamask exists, but it's still too much to ask for people to use it. One wedge issue coming down the pike that may force this is mandatory age verification, since most websites will need to outsource that.

I for one would prefer something entirely anonymous and cash-like. I don't need my preferences to be on file with god-knows-which data vendors to form profiles on me just because I liked a stupid article one time enough to give the author a dollar.