If a month-long subscription is paid in Bitcoin to an .onion site using Tor browser, how does that site still recognize/identify the same anonymous user when the return in subsequent sessions, given that Tails OS wipes the computer clean of any previous encounter with that site, as well as erases its accounting of the bitcoin wallet used to pay the subscription?
(If in some cases) no username or password set-up seems to accompany these paid subscriptions, Isn't there a risk of the site not recognizing the returning subscriber and barring access the next day, because they scrubbed their system per session, and therefore forfeiting their subscription prematurely?