I think this is nonsense.
Put yourself in the shoes of an advertising company; You think you're going to care if your ads appear in unsavoury places? Rubbish - ads are there to be seen and clicked on, because they generate revenue - nobody is getting salty and upset because the people doing the clicking happen to be total cretins, their clicks are worth just as much as the next person.
Not sure if trolling?
Have you had your head in the sand for the last year or so? You don't remember the YouTube fallout? https://www.adweek.com/agencies/fru...s-pulls-u-k-spending-from-google-and-youtube/