One of our oldest titles (we have about 24 DVDs now) is currently a top 20 seller for our distributor. Like Tony, nearly all of our back catalog titles continue to sell well, so we really don't have reason to discontinue a title. The only titles we've dropped are ones where the license to the content expired (part of a deal we made when Ryan sold his interest in the company to AJ 3 years ago)

But... there are a lot of studios that shovel out crap, are happy to sell 300 copies of it, and then move on to the next title. I don't think that's necessarily the best way of doing business, but hey, if it works, who am I to argue with it.