The Web Monetization API was another recent effort to try to make this, the latest of many attempts. See previous HN discussion: https://news.ycombinator.com/item?id=39274455

My guess is that 1. there’s virtually no demand from potential supporters for a more convenient way to pay creators than existing payment/subscription apps, and 2. relatively few creators have direct control over their own internet presence anymore, so any solution that requires modifying a web page is dead in the water.

Any new attempt to pay creators that doesn’t factor these two realities in will likely fail, because it just makes things harder than existing solutions.