Before I installed Privacy Badger, my experience was usually ads for stuff I really didn't care about, unrelated to the subject of the website. Then I start searching for something, find what I want to buy and buy it. Then for months I get ads everywhere for the product I just bought. Never for example for accessories.
Of course, ads have to be as obnoxious as possible. Not just being there if you want to give them some attention, no they have to destroy your reading experience.
I once gave a news site a nice donation. By sheer coincidence right after that they changed the layout to the point I stopped visiting. Of course, my donation could easily be seen as a reward for the articles I read there before, but it didn't feel right.