Why would you want effective advertising? The sole purpose of advertising is making you buy something you otherwise wouldn’t buy. Call me old fashioned but if I want to buy something I look up reviews, I don’t just scroll Facebook until a good advert pops up.
I just explained it. No advertising on the internet at all would be worse than some (because most of free services, publications, networks etc. would be shutdown). So, if need to see some ads, let them at least be relevant.