I pay my $12/month. I used to keep my git repos on another server but it's less effort, easier to share, and easier to access from github. pg should create a field for github/repo in our profiles. Here's my acct: https://github.com/melling
I'm paying $22/month (medium plan) and have no private repos left. The next plan would be business gold for $100/month with 50 private repos. Which is a little over the top for me.
I guess I'll have to opensource more stuff to make room for TOP SECRET projects ;)