All of these services (including PayPal) charge no fees for personal payments. Just to merchants for commercial transactions, which often come with buyer protection, free credit/payment plans for the buyer, etc.
I believe this would work, but I'm not an influencer: https://medium.com/@mariusandreiana/open-letter-to-banks-ple...
Revolut is used because they hide their low forex exchange fees (despite their claims of nearly no fees, you'll find cheaper transfers elsewhere).
Venmo may be convenient in the States. I've never seen anyone in Europe using it. Banks have some system to send money to a phone number, though, which serves the same purpose.
In the US and probably other places as well this is more like an SSN where just having the number allows you to do all sorts of (criminal) abusive things.
https://mobile.twitter.com/barclays/status/77386310895160115...