How about making a website selling banned, unpopular or borderline racist literature? And then payment providers cancel services to it. Can I then take orders using cash via letters? Seems like it can work. Hopefully the post office, Fedex and UPS and other mail carriers don't notice and cancel it for some obscure money-laundering law/regulation about mailing money! Must I maybe resort to selling that literature on the street corner, back alley maybe?