Those staff usually have their private champions within the company - usually technically focussed project managers who can run interference against the commercial side - but nod along with the CEO who they view as the ugly necessity of having to have a 'business guy.'
They are sending messages of unity, not fealty to Sam Altman.
Working together brought them to the top of the world both in term of research and product. This is a dream come true.
What would surprise me is that they wouldn't do everything they can to avoid breaking their team.
These are meant to be top-tier researchers, you'd think they'd put their thoughts in their own words. That too would avoid uncertainty and make their position easier to understand.
Just retweeting a heart emoji because their dear leader (lol) did it is... odd, to me. Unless it's specifically intended to send the message that they'll literally do whatever he tells them to do. Which is about a thousand times weirder.