Sounds like a good idea. Basically a concierge credit card service that can negotiate canceling a subscription for you. That's actually the best thing that can happen for these cancel my contract type companies.. You pay a flat fee say $10 and then do the hassle of canceling for you or something. Or you build it in as a perk. The mass aggregation factor gives you some money to get the whole process streamlined for your customers.
It's extremely useful though, and they say all the right words when it comes to their revenue and their management of user data. The way I see it: they're basically a credit-card company that gives you much finer control of your online payments; they could probably screw me over, but so could my actual credit-card company. They at least make it harder for other companies to screw me over.