Unless I'm missing something, this isn't a paid update either.
And you can turn it off in a few fairly trivial ways[1] (though I'll admit this might be past some users, anyone who has even heard the word 'distro' probably shouldn't have an issue with it)
Uninstalling and hiding that update only works until MS releases a new version of it, at which point Windows will unhide it and reinstall. It's not a solution.
[1] http://superuser.com/questions/922068/how-to-disable-the-get...