Stars???

[Quixilated]

I noticed that too.  After a perusal of the member list, it looks like fat stars are assigned to users who have maxed out on stars and can no longer add more. So, ten-star members (perhaps to imply that the posts are still accumulating even if the stars aren't?) and purple mods (whose stars are limited to five or however many it is).  Fat stars means you have collected all possible stars ... probably.

This thread is reminding me of the Dr. Seuss book about the Sneeches on beaches.