[smeg]

>Google's is worse because it takes all rights to use your work however it likes, and then states in its Privacy Ppolicy that it won't use it for anything other than to provide the service.

Please point to the part of the Privacy Policy that deal with "my works" or "works that I create and own". I think if you look closely, the PP only deal with information Google collects about your usage of the service, which is quite different to works you upload to Drive.