Facebook engineers may love to beat their chests about social justice, but when push comes to shove, they are not about to walk away from those gold plated salaries & stock grants. Most of them could leave FB and get another job paying somewhere in the ballpark of $200k (if not much more) within weeks, or a couple months. But no, 200k is not enough, they need 250k + equity + food etc. etc..
So to social justice oriented facebook employees sticking around facebook: spare us the performative gnashing of teeth. You know what facebook is, either admit the $$$ make it worth holding your nose, or put your money where your mouth is & go get a different job.