koen - 4:41 pm on May 28, 2008 (gmt 0)
It doesn't matter whether the search engines bring in money after a visitor browses the cached version. That's not their business model.
Say I give you 3 days to read my ebook. After those 3 days the free access disappears. But you have made a copy others can view. Even if your copy does bring me money somehow, you weren't allowed to keep a copy and I'm not interested in the business model you force upon me.