I don't see it working, either, but mainly because the target audience is small. Sure, you can lie to get your money back, but you would be lying to yourself.

I don't see it working, either, but mainly because the target audience is small. Sure, you can lie to get your money back, but you would be lying to yourself. For some people, the personal shame is worse than losing the money. Likewise, you could simply set the money aside yourself without involving the service. But, again, for some people, a promise made in public is more binding than one made in private, even if there are no real consequences to breaking the promise. For the portion of the population in both categories, this service could be attractive.