Wow, look at this huge list for how to cancel from these kinds of sites:

https://www.truebill.com/how-to-cancel

That's pretty awesome. I'm just going to check this list from now on before I put my credit card info into a web form.

How does Truebill make money? It seems a little too good to be true to be free. I mean, I can think of a bunch of perfectly acceptable ways to make money off this (selling anonymous information about what makes subscribers unsubscribe to companies, for example), I would just like to know before I sign up what exactly I am signing up for.

Founder of Truebill here...

We plan to make money by recommending new services (i.e. we see you have X and Y, would you like to try Spotify).

You've missed a golden opportunity to claim "most ironic business model". Go ahead, charge that monthly fee :)