Except people who watch porn also buy Cheerios and Volvo's - I've never understood why such a massive market is always immediately ruled out in such an ad hungry world.
Brands were so freaked out to have their dish detergent show up next to an ISIS video because whoever uploaded the video gets their check for $5 or whatever, and then they're literally supporting terrorism.
Advertisers in the current environment can be as picky as they want to be.