Do people actually click on the ads?
I've been on the web for a long time and a cant recall ever clicking on an ad other than to move it out of my way.
Maybe I just have a cruel bend, even if I see content that interests me I'll open a new browser tab and go to the content rather than click through.
To be honest most of the targeted click through I see (that gets past adblock) is late, I have already surfed and made my decision to purchase or not and what and who to purchase it from.
As far as the Bots go, this is what happens when you deal with the devil, he's always going to get his cut first. You never let the Wolf count the chickens, he's always passing some behind his back. Greed, laziness, and stupidity leaves the door wide open, just like Bill Gates selling an OS he did not even possess!
Take that Gates mentality and apply it to real world purchasing - For larger purchases I have found I can get a better deal in person at the brick & mortar, using the info I have found online to beat them up with. You just have to make the effort to ask for a lower price, often you will get the better price on the first ask as the salesmen are bonused on the # of units sold and they will just give it away for the asking instead of doing the dance, then they can check the win box and move on to the next victim.