> If you have $20 to spend avoiding ads, you have $30 to spend on cool products

Yes, but if you are so against ads that you spend $20 to not see ads (I am definitely in this group) and then see an ad for a "cool product" anyway, then that product is no longer cool. Any time something like this happens, I legitimately develop a grudge against that company and their products.

I might have bought that product before seeing the ad, but there is no chance of that after seeing the ad.