Hell lets be honest here, I think many advertisers do sway more heavily conservative but the problem is advertisers want stability. Elon basically opened the flood gates to let anything go (as long as he agrees with them) and that created massive change at once. So you have to play the game of pandering to your audience who are likely going to be on the left just due to the left being a far more numerous group and no big advertiser would want an ad anywhere near a racial tirade. Like the higher ups of these corporations can and may be incredibly racist but you don't want your brand associated with it since you basically cut off a sizeable part of your market in the space you are trying to advertise. At the end of the day they want money and they don't want to rock the boat visibly.