I use it and find it handy. As stated above, you control your privacy. You'll only be linked to the people you want. Many people who don't know any better shouldn't even be using it. The link I provided above was to show how they make their money, and how they should be paying the users who provide them with all of the info they receive. They don't get any info from me, so I don't qualify. This info business is not lost with Microsoft either. If you upgraded to Windows 10 using their handy-dandy free links, they'll have access to a lot of your personal information, and will be able to use your computer for their own needs. Check out
http://www.slate.com/articles/technology/bitwise/2015/08/windows_10_privacy_problems_here_s_how_bad_they_are_and_how_to_plug_them.html. I provided this link in another thread, but it will help to keep prying eyes out of your info.