I'm in the same boat as you. But considering there's this thing called the "ad industry", there's bound to be a considerable portion of people that are influenced enough by ads, even just at a subconcious level, that investing money into ads is a worthwhile thing to do for businesses selling products and businesses offering ad platforms.

Ad companies figured out that sales are much better with whatever publicity they can get, even bad publicity. It doesn't work with some people, like you, but they haven statistically proven that just getting their name out in any capacity will increase sales.

I think that, to this day, the only item I have ever bought because of an ad was my eargasm ear plugs. I may have seen them somewhere else first but an ad popped up and I happened to be in the market so I got them and don't regret it at all. Otherwise I buy things because I do the research, not because they push the ads out.