https://github.com/popular/watched
I couldn't count a single project. I have never used the GPL in any software I write because I want anybody to be able to use my software and contributions.
Google, Microsoft, Apple (who are actively purging what remains of GPL code) et al will not adapt your project for bundling or distribution or use if it is GPL. I think most developers are more interested in having users of their software than attempting to shoehorn them into some ideology, which is reflected in the license usage stats you see.
to add to that, the FSF completely screwed up v3 which likely scared away anybody who was on the fence about which way to go (it was also more to do with the anti-commercial rhetoric around the changes as it had to do with the changes themselves)