Bitbucket is not as good? Feature-wise they're almost identical.... I use github for my FOSS projects and bitbucket for stuff that shouldn't be public, like for-profit soft and side-projects. If you don't see added value in free unlimited private repos that's not the case for many of us.
I like Github best, but will readily admit it's mostly just because I'm most used to it. Like you I use both, with Bitbucket for my private stuff and Github for the public stuff. The latter mostly because that's where people are.
I gladly pay for the Medium plan just for my own personal private usage. It's a wonder these services last as long as they do, when you guys don't want to support them.
The point is the nature of git means I don't really need any of them. They're convenient as a public dumping ground (Github) or "backup" (Bitbucket) with a decent web ui, but if they disappeared it'd make very little practical difference for me (other than recruiters having to find me via another site).