I think it's more a matter of simple customer segmentation (same principle behind outlet malls: charge price-insensitive customers a premium, without losing th

I think it's more a matter of simple customer segmentation (same principle behind outlet malls: charge price-insensitive customers a premium, without losing the price-sensitive but hassle-insensitive customers who are willing to schlep to the outlet mall for a discount.) AdBlock allows Google customers to self-segment the same way. Win-win.