#JOSS - the Journal of Open Source Software [1] sounds great for getting academic credit for #FOSS, but it's run on MS/GH, which defeats the point. If you still have a GH account (like a birdsite account to help people leave), feel to comment further at [2].
PS: The main mastodon git repository is still on <s>Birdsite</s>MS/GH, and there are few comments about the issue [3] ( @Gargron ??).
[2] https://github.com/openjournals/openjournals.github.io/issues/11