We've wanted to make this change for the last 18 months, but needed our Enterprise business to be big enough to enable the free use of GitHub by the rest of the world. I'm happy to say that it's grown dramatically in the last year, and so we're able to make GitHub free for teams that don't need Enterprise features.
We also retained our Team pricing plan for people who need email support (and a couple of other features like code owners).
In general we think that every developer on earth should be able to use GitHub for their work, and so it is great to remove price as a barrier.
That said, the news made me wonder what exactly I’m still paying for with my personal Pro account. I went to the pricing page https://github.com/pricing and it seems Pro isn’t even listed anymore? And the Billings page https://github.com/settings/billing says “Pages, Wikis, protected branches and more for Pro developers” without any further explanation or link to docs explaining the differences. I can only assume that Pro has the same set of features as the $4/user/mo Team plan, but the messaging is certainly pretty confusing, don’t you think?
(I sure hope this isn’t a sign of neglect for individual developers, who are still the backbone of open source activities.)