I'm experiencing that as well - it looks like any (unofficial) github buttons need to have their domain changed from github.com to ghbtns.com. The commit message seems to confirm this.
One user can have up to 10 free websites in their account (and unlimited "designer platform" websites too) so more than 1 website is the average per user.
'disrupt' is an internal thing. There's a try/catch somewhere that's failing, but he catches the error and adds it to JSLINT.errors as if it were a problem with YOUR code.
Hipstamatic lacked sharing, at least when Instagram came out. That was the thing that set Instagram apart -- it did this popular thing with photos on your iPhone but bolted sharing on.
That's not very nice.