Has anyone ever tested what 'works' in a paysites members area so far as a ratio of feeds : images or other types of content?

We have around 200 feeds in our custom CMS right now and, whilst i obviously want the members to see that we have a whole selection feeds, i dont want them to think that is all we are going to be offering them.

Anyone have any feedback on what a good method of managing this would be? Right now im thinking of 'previewing' 4 of the feeds in rotation each day and having a link setup that leads to a page with them all listed. Would that work in your opinion?

Regards,

Lee