I had a miserable near account cancelation experience with Amazon recently and wrote about it here:

https://gist.github.com/softwaredoug/6f74748822bf52728545

What makes the minor threat of account cancelation so scary is all the DRM they sucker you into. Movies, books, etc just deleted by canceling your account. And there's about 4-5 major companies now that sell e-books, movies, etc all with this model. Why should I trust any of them? Why can't there be a different model. Instead of the Internet destroying the old distribution models, its only created stronger more consolidated control over the distribution of media. Time to visit my local book store.