I use Instagram only to follow my friends, does pixelfed have private accounts ?

yes

I just found it odd to phrase it that way, as I find it’s uncommon and it feels like it would place him as the main worker of that company. I don’t know the intent of the author

People usually do not write Bill Gates’s Microsoft or Steve Jobs’s Apple

So weird to say

Elon Musk’s SpaceX

We don’t do that for other companies, and he hardly engineers anything at spacex

Not necessarily