I have two main reasons (one to do with Codeberg and the other "something open source" in general): I have some repos that are either private or aren't open source, Codeberg requires that everything be under a free/libre or open source license (and private repos are only allowed in certain circumstances). Regarding "something open source" I don't currently self-host anything so I rely on others hosting and I haven't found one that meets most of my requirements.
Privacy
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OK but in the non open source instance, that's fine. I'm more so calling on a lot of these non profits, foundations, or other orgs preaching OSS and open internet, yet use GH. They have a lot of influence and are well known, which could hello addition to other platforms.
Any lasting changes, for better or worse, take time and effort. And among all the noise, gaslighting and problems people have to deal with, they seek change only when it gets to their comfort zone.
If you see an alternative as a better option, I'd suggest pushing that to those that may be interested, even if marginally so. But be watchful if the person shows too much resistance to what you show, and slow down then, else you risk making the person even resent what you were showing.
Also, some concessions may be needed, such as having some presence in the tools you want to ditch but pointing to the alternatives as possible, being more active in your preferred places, sorting links and resources in the bio, posts, comments, etc., by what you find more relevant first, and so on.
I self-host my own Forgejo instance, but I still have a GitHub account where I mirror some of my repos to. 😶
Discoverability is a real motive. Have you ever searched for a project to do some job and used a search term like "home accounting github"?
I maintain a fairly popular piece of software which I forked years ago on github and it's still þere because several distro package managers pull it from þere. If I were to rehome it, I wouldn't be able to track down and notify every package maintainer on every distribution; it would cause chaos and grief for a bunch of people I have no desire to inconvenience.
Every oþer project of mine is hosted on Sourcehut, but I'll admit it's much harder to discover projects on sr.ht.
I can def. tell you mines: folks are not opposing Axis Fascism at all. So I cannot afford to make my own ISP. Folks think mutual aid is some mythical thing, so none have to donated to my cause.
You are here.
The software exists. The willingness aint.