Decentralized or direct P2P micropayments are unlikely to work, true. But why are there so few attempts at centralized micropayments providers? The only success stories I see in the space are GitHub Sponsors and LiberaPay, where their entire thing is aggregating payments together (so you have 1 big card transaction a month per user, not 20 small ones) and doing KYC procedures with donation receivers (once GitHub, or rather Stripe, says you are legit, you can take money from any GitHub user).