To retain people buying memberships.
http://www.xbiz.com/news/129869
It's like adding a new scene every week, it's just not enough to keep members buying. Either from your site or another one.
I saw a thread today from an affiliate looking for solo girl sites that do weekly shows and there were quite a few answers. So I'm assuming that members and affiliates like live shows.
So why don't these sites get together and share their live shows with each other, even if it's only 7 that ups the shows to once a day. An excellent way to upsell to each other, retain and attract more members. Done with 14, 21, 28, etc. The snowball starts to roll. Customers will start to think the norm is live shows, they will want more and more and if the shows are good provide affiliates with an effective tool to compete against sites who give away free pre recorded porn.
The days of selling pre recorded porn are numbered. Adapt or die.