Where would those advertisers go?
They can boycott but I think it is quite likely many companies will see their social media presence as a mistake. Being that much in contact with the public is far too risky. It takes just a bad tweet to impact revenue. It also places too much pressure on being forced to take an immediate stance on current events.
These boycotts will force companies to abandon ALL social media.
That will lessen the power the left has to scare companies into compliance
“Where would those advertisers go?”
Exactly. By claiming they do not need X is claiming they are currently wasting investor money on X in the first place.