As far as I can remember, Paypal was successful in Europe because of the tie-in with Ebay and because bank transfers at time were slow thanks to asynchronous settlement. SEPA fixed that, I don't know how much lobbying in the EU was involved but I'm certain payment processors eschewing banking regulation hastened it (the same way the push for WERO and the Digital Euro is coming from the problematic VISA/MasterCard duopoly).