Set up a social media profile for all of them: get people interested in their day-to-day lives and use it as a way to draw attention to their camming. Think about making a few blogs too.
I've had a bunch of success with an amateur pornstar that I made a social media profile for a while back. It's my best case example, and while others have had moderate success, this is an taste of what can happen if you play it right:
http://www.xoptimizers.com/success-s...media-profile/
You could always outsource that kind of thing, of course. After all, professionals are good when you give them money to do what they do.
Decent adult social media management can be found if you look in the right places.
Best of luck!