Well - I dont know, our older titles still sell OK, especially if we dust them off and do a feature on them now and again.

On my first site, we had a particular trick that worked VERY well. We always had the same amount of content on the site. Stuff ran for two weeks, tops. Then - we would pull it, and replace it.

A year or two down the road, we would post it again - and viola... it was NEW again!