But this is about users who click on ads on Facebook. The sort of users who have javascript disabled are going to self-select out of that group pretty strongly.

But this is about users who click on ads on Facebook. The sort of users who have javascript disabled are going to self-select out of that group pretty strongly. And even among the most technically literate groups, I'd be amazed if you saw 80% use of noscript. So many sites require javascript that it's easier to browse with it enabled.