Hehe, laugh all you want, but consider this... we've been making money using predominantly contextual based advertising without any blind clicks, trading, skimming, etc for more than 15 years. It works just fine.
That said, we've certainly left money on the table. I have turned away an awful lot of popunder and mobile redirect money. Same with fake IM ads.
Like I said, different strokes for different folks. It's just two different approaches.