Frankly, I don't see how having a team that works "to implement the UN Guiding Principles on Business & Human Rights, to protect those at-risk in global conflicts & crises including Ethiopia," makes any difference to advertisers (but honestly I don't quite get what the team was doing concretely within Twitter... well, maybe Elon didn't, either!)

Advertisers can be spooked by the contents of tweets. Basically few brands want to be associated with extremist or otherwise 'damaging' contents but that's very different and rather touches moderation. That's why advertisers are currently cautious, not because of Human Rights (capitalised) in global conflicts...