Recycling content just doesn't work out very well. For the most part, recycled content looks out of date, the hairstyles are wrong, the clothes are out of date, and so on. Plus shooting styles change, especially in mainstream porn. Notice all the current reality guys shooting with slightly overdone wide angle lenses? they discovered that at the right angle, you can make people look smaller and penises look bigger.
Plus once your content is out there and on the tubes and torrents, there isn't any long term recycle value anyway.