Podcasting 2.0 is exploring similar paradigms with The Lightning Network. Decentralized. Cross border. Open protocol.
I personally think the barrier to entry is still high for the payee/payer. But it seems like a solvable problem. Probably some browser extension that can help trigger the transaction when you navigate to a compliant site.
When you start paying with micro transactions for content like a blog post or a medium article, you quickly trip over burdensome creditcard fees.