Actually, check what the former COO of Paypal said here about blockchains

https://cointelegraph.com/news/paypal-ex-coo-bitcoin-crypto-...

as i read it, his point is about centralization, not micro payments

blockchain - decentralized (.)payments paypal, many others - centralized (.)payments

nothing disruptively new here re: payment part, just the decntralized part

The merchant on a sub-$1.00 transaction would disagree -- after Apple & PayPal extracted their fees (esp. if transaction used CreditCard).

they batch their transactions. not hypothetical... i ran merchant gateways for many of them