SourceForge went bad ... and everyone left. That doesn't seem like a bad thing and there's no reason for me to think any given site / service will or won't go bad too. I expect that for any number of reasons I might need to move from one site to the next.
The rest too is kinda hollow to me. The fact that they're for profit doesn't upset me. I figured they wanted to make a profit when I signed up even ... not sure how that would surprise anyone now.
Co-pilot, I personally don't feel there is a compelling reason to leave github due to that either.
Maybe I'm not versed enough in some of this but as a rando dev I'm just not having any problems on github these days ...
I'm not saying the author is wrong or right or that I'm right or wrong, just that I'm not finding that article very convincing.