I upvoted you, but mostly because I hate downvotes for unpopular stances.
But please answer this question: how does using Github make you "less free"? All parts of Github (even parts of the web interface, like the wiki) can be used stand-alone. All your data can be easily dumped, most of them in a ready-to-reuse form (the git repositories, the wiki and github pages). So, from lock-in perspective, gitorious and github are quite alike. What exactly is it that makes you, as an individual, less free then using gitorious? Sure, the software is less free, but your data: not so much.
The point that the article makes is that OddMuse makes a horrible project hosting system. It's easy enough to store a link to github, or bitbucket, or gitorious (and in all reality, they all speak git, so it's just another remote) as the official project location in whatever new wiki-system emerges.
So in order to "support github and bitbucket" you have to keep copies of your project at both sites? That makes less sense than the original post. The OP uses and when including bitbucket the only way your explanation of "support github" makes sense is with "or bitbucket."