Lemmy is somewhat protected by being an AGPL-licensed project, preventing proprietarization. If there’s ever a relicensing effort, ba fearful.
I’m not sure what exactly becoming a organization would entail, but so far I’d say the development part is not really large enough? For me I would start being suspicious when a significant amount of dev power came from compan(ies), but so far no company has shown any interest afaik.
There’s already been a few forks, for example lemmynsfw has made some changes on their side, which nutomic is now looking to integrate back into lemmy.