The Linux kernel and Git projects on Github linked in the article are both just mirror projects for projects hosted elsewhere.
I guess I'm pointing out it's bad journalism.
"Project" is a pretty ambiguous term, of course; there's gists that are multi-file full-fledged database adapters, there's gists with one-line bug fixes. Both could be more influential than full-fledged "normal" projects... it depends on the circumstances. I think each have their place in programmer society.
With the ease of forking even plain 'repository' is a relatively vague term.
Tried Google with no luck.
But you have to take into account that on BitBucket you get one private repository for free, so I guess there's loads more of them than on GitHub. Also, I'm not sure if all repositories are on that list or not - they don't seem to filter it, since there are some repos 0bytes big at the end.
If they had ~350k private repos, they'd get between 385k$ and 490k$ per month - I assume that would be big news mentioned somewhere already...