Well,the reason why I am saying this is because Canonical Group Limited(Canonical) is not just spying on Ubuntu user’s data ,rather selling it also to big corporate companies like facebook,amazon and many other third parties.
How it do so?
You must have used Ubuntu’s DASH Search feature,so whenever you type something it sends this information to third parties.
Simply go to dash and see legal terms,it is very clearly stated in the third paragraph.
See it for yourself here only:
We are doing so to provide better services and convenience to the user.
Well, this is what Richard Stallman has to say: