I've never heard of cash at any EV charging, though I haven't used all brands. EVgo, Electrify America, ChargePoint, Tesla: they all do credit cards or apps, and sometimes NFC or RFID cards (ChargePoint for sure uses RFID). But payment is not what the access tag is for. Payment schemes are separately tagged. As I quoted in the OSM docs, access is all about who can use it. All of the charging companies allow anyone, with a few exceptions like chargers on the property of companies that have fleet charging. If you're talking about drama, try using Electrify America or Francis Energy, if you can even make them work. Rivian is reportedly good, as is Tesla, which has the least drama of anyone because they actually pay people to keep their system up. They got the station in MA up in 48 hrs after an arsonist torched it.