Each promoted or created by a famous company repository is popular at the beginning. Also it is possible to have a
number of them which are in trend right now (publications, marketing, events).
It doesn't mean that those repositories are useful. As an example, compare these two links:
ordered by stars
The gitmostwanted.com project analyses githubarchive
data in order to highlight the most interesting repositories and exclude others. You can find some concepts in the
GMW is like a personal database, where you store liked repositories. As soon as GWM
gets 200 registered users, it'll be possible to find people closer/similar to you by preference.
Right now you can synchronise your stars with GitHub and share the public profile link
(http://gitmostwanted.com/USER_NAME) with friends/teammates. Have fun!