Maybe CCleaner should rethink that one, that is an awful business model. I wonder if they do the same thing with their OS X version too, because if so they might want to have a chat with the MacUpdate Desktop folks too.
IMO you can't blame app update tools for breaking a business model. That's a really idiotic business model to begin with. Charging for updates, fine. But charging for the ability to auto-check for updates? There is a reason nobody else in the industry does that. Because it's stupid.