I tried to subscribe to this, only to have their billing system tell me my address is nonexistent. Received a support e-mail from someone named Rajish Rupaldi who asked for my full (unredacted) credit card number and my SSN so he could 'urgently process manual transaction.' I told him just to forget about it. There's definitely some shenanigans happening in their billing department which my financial info doesn't need to be a part of.
That does not seem kosher. Have you tried calling them?