> 4.6% ? No, sorry, get a better platform
Agreed, but ... is there one? I've been watching the online payments space since the turn of the century, so I've seen a lot of experiments come and go (BuskPay, eGold). I've seen the DotCom bubble and the crypto bubble come and go.
In that time, the digitised credit/debit card infrastructure become - and stayed - the de facto standard for digital payments. A classic example of what Giblin and Doctorow call "chokepoint capitalism".