My suspicion is that they were hacking their way to growth by basically rewrapping Stripe until they got their own solution up. Stripe cottoned on, the game is up. That would explain the vague answers
4. Responsibilities and Disclosures to Your Customers
(iv) not use Services to sell products or services in a manner that is unfair or deceptive, exposes Customers to unreasonable risks, or does not disclose material terms of a purchase in advance;
and (v) inform Customers that Stripe and its global affiliates process Transactions (including payment Transactions) for you.