I downgraded too, and noticed GitHub Pages stopped working (the content is still there, but they don't rebuild - although they did for a little while after downgrading). It is clearly marked as a Pro feature, I just hadn't considered that the free private repos would be more restricted.
It's not a big deal to me, I'll probably just make the repos public.
It's not a big deal to me, I'll probably just make the repos public.