They are still not banned from taking cash payments. They are banned from using a specific cash-taking service. It is still possible to set up a PO box to mail cheques to. Public-access television did not mean that anyone can have a show(or was entitled to being shown), either, iirc. They could still start their own newspaper, and the indie/local newspaper cycle is still being perpetuated in artsy or politically leftist circles.

>They are still not banned from taking cash payments. They are banned from using a specific cash-taking service. It is still possible to set up a PO box to mail cheques to.

That's a de facto ban and you know it. There have been zero cases in which an internet business has kept itself above-water via asking for checks to be sent to a post-office box.

Instead, there should just be a post-office payment processor, operating over the network like all the others, and legally required to serve any customer.