That is the fallout of the PDP thing, not the reason for the fallout itself. I find it funny that a company thinks anyone buys that they just found out the way google advertising works. It's search/purchase related to the individual and there's not any handshake between partner and content.
But you're right in that I didn't really answer your question. JonTron would be another example, but he opened his mouth and invited it himself. The idea is that, similar to what Polygon is doing with Twitch, WSJ is reaching out to the companies to say "Hey Pewdie and YT is saying nazi shit to sell Coke! Care to comment?" Which is an approach less interested in the comment and more interested in the fallout that it creates.