My hats off to you! Hopefully your description of the time involved and the cost of maintaining the adsense for profit sites will discourage others from doing it also. I use adsense on all my websites but I don't promote it. My personal opinion is that if I pay for a customer to come to my site and they don't buy something maybe I can re-coup some of the money when they leave through adsense. I wouldn't totally throw it out. There is good money to be "re-couped" we are well into the four figures each month. We do not promote adsense only sites but ecommerce.