While there are a lot of good points in this thread from quality, to different marketing approaches they are all little more than a piece in a puzzle if you are looking for rebills.
Now don't get me wrong. Quality is a big factor. But..
You also need updates, and keep up on them. If you have a ton of material, especially video, the odds of them ripping your whole site in 30 days will be difficult depending on their internet connection.
If you want rebills, you need to build in more interaction. Not just be the same old rerun of the same old material and site where the members are disconnected. Clothes, model interaction, cams, e-mail, suggestions, etc.
One of the biggest factors is people talk like a customer's porn budget's unlimited. But most have some kind of limit. So they may spend 'X' amount of dollars on your site on month, go to another the next, and return the third. I have plenty of customers who do this. Either bounding between my sites, or going to another and returning every few months. They are no different then me. They have so much they are willing to spend, and bounce between their favorite sites.
