There recommendations engine must make them a small fortune, I think that's one of there really keys to success. Once you have started looking at certain produc

There recommendations engine must make them a small fortune, I think that's one of there really keys to success. Once you have started looking at certain products they really know hoe to hit you both in email and on their pages about similar ones. Armed with the amount of purchase data they have they probably know what people want better than the people themselves.