Not a single payment processor in the world has a 30% fee while also having a competing product in which they can have the prices arbitrarily low (because they

Not a single payment processor in the world has a 30% fee while also having a competing product in which they can have the prices arbitrarily low (because they don't care about the 30% fee they pay to themselves). The egregiously high processing fees from AmEx are at 3.30%.