my theory is that their main asset wasn't their consumers, or even that data, but their ability to be a card processor and issuer (like the big banks). I don't think there's very many of them, and the effort required to build that is very time consuming and expensive.
They have the ability to issue tokenized numbers, that's something that not everyone can do.
TBH, I'm not deeply involved in payments, but what they're doing is extremely unique and I could totally appreciate a larger company (such as a paypal competitor like stripe) wanting a piece of what they're doing.
