People aren't against companies, people are against Meta. In the wider fediverse, anyway.
A while back there was talk of Tumblr potentially joining the fediverse, and it was met with neutral to positive reactions. No idea what happened there, maybe they're still working on it, but I do not expect a "fedipact against tumblr" to gain as much steam (if any) when they decide to announce they're ready to flip the ActivityPub switch.
(no idea if my other comment got sent out, this may be a duplicate)
I don't think swappiness has worked that way for a while now.
https://chrisdown.name/2018/01/02/in-defence-of-swap.html