The Basic Attention Tokens from Brave were intended to work in a similar way: you could pre-purchase them and a fraction would be sent to an website when you accessed their page, in theory removing the need for paywalls.
I thought it to be an interesting idea, but it'd only work as a replacement for subscriptions with a lot of people onboard, which depended not only on adoption for Brave.
Matters of regulation and off-ramp of these tokens into the usual financial system were complicated, since they built the infrastructure on Ethereum and had to partner with an existing crypto exchange to get it running and vetted. Eventually they stopped supporting my country and I never looked into them again.
archive.is ftw I guess