Different styles of sites will have much different types of customer expectations.
Mega site
Niche
Micro niche
mega niche
Solo
Solo mega
all access passes
dvd download sites
etc. etc.
Because of this, the program's management will have varied business plans on a site by site basis (at least it should be), since perceived value from the customer will be different. It is ALWAYS about holding the consumers attention by seeing what turns them on and gets them off. Many producers get caught up in the numbers game and their perceived ideas of what will make money (normally by seeing what is "hot), and is often concepts that are already completely saturated.
The simple things, such as frequent, on time updates AS PROMISED is another crucial piece that most sites do not deliver on.
Have a solid base of original content (and not b.s throw away non exclusive bought content, unless that is what the site is based on), but enough to make the consumer feel they received value. There is NO SET AMOUNT. Ther are some of the big sites online that have no more than 20 scenes on them at any one time. But these are branded sites that have made a name for themselves by either a great idea, amazing content, or being first in a niche.
With certain sites, niche, specific model, etc., it's not about the quantity but the quality. People are signing up to see the concept and the visuals you presented. They ARE NOT signing up for the extras. And if they are enjoying the extras more than the original selling content, the program and sites have bigger problems to worry about.
Don't forget about the power of branding and having an ORIGINAL idea that captures the imagination. Producing vanilla porn is a difficult business. The amount of porn being produced is only increasing each year, and as the online and solid media adult markets are merging, coupled with international productions. Certain ethnic markets are over saturated, such as Eastern European models, and that has been for 10 years now. The times are always changing, and competition and choices for consumers will only increase.
Back on the amount of content... think of a DVD. Is a 4 or 8 hour DVD better than one with only 2 hours of content? Possibly.... but generally not. In fact, unless you've never seen a adult dvd before you might not even be able to jerk off to the longer running time DVD. It's longer because the quality is generally not there, and the producers of the title are purely trying to hit a price point. Is there anything wrong with that? Of course not. It fills a need in the market.
Too many times webmasters look for catch all magic numbers. There is no such thing, but is does make for a good exchange of information.
