What's new here? People have been selling things online for 30 years and selling digital things (ebooks, zines, videos) for just as long. This is basically a lower-tech Gumroad.
It comes from the drive for "monetisation" which is the most recent form of alchemy. Where the alchemists of old tried to turn base metals into gold these monitists try to turn everything into a bunch of changed bits in a file on some bank's computer system. Future history will tell whether monetists had better luck than the alchemists of old.
Crypto/payment startups are a sort of sudoku distracting VC's and software engineers, building an abstract world of endless technical complexity that passes for fulfilling work.
What's up with the hypocrites who either have a paid job or spend other's earnings for a living but insist that other people must not charge money for what they do, whatever that is?