Earlier quoted context omitted.
Don't be evil? Pfeh. The only thing left of Google that they haven't managed to screw up or cause outrage over is search. The only thing they can't afford to change, for fear people will stop using it. Search is gone too, virtually all ads: http://cdn.ghacks.net/wp-content/uploads/2012/01/google-sear... http://www.click-conversion.com/wp-content/uploads/2012/08/g...
Your two examples are "get credit card" and "Nike shoes on sale"? Try "geomorphology" or "big o notation" or anything not consumer related. Quite frankly if I searched for "Nike shoes on sale" then those ads are exactly what I'd want to see.
Try "geomorphology" or "big o notation" Go and buy those keywords and see what happens. Google posts ad for bought keywords and that usually includes every commercial word. If the defense is that not sure if you're helping them.