It is probably true that most webcam viewers click into several rooms simultaneously, each represented by a tab up above in Windows (or the like)... upon perusing the menu at the start of their visit. In the same way that lots of women end their stream and log-off at random times, the male viewers intend to consider other models if their very favorite (among those who are 'live' upon their arrival) stops camming for the day, or goes on lunch break, or whatever.
SO those rooms who cite "800" viewers at any one moment... probably have nearer to "120" actually viewing the stream at one time. (they are not usually there staring at your breast as they've seemed to be for 30 minutes without having said a word)
With that said, most of a webcam model's income is going to come from a very small segment of her regular viewers... and to some it is SUCH a mental hurdle to recognize WHY they are drawn to HER (she may look like the viewer's ex, for all she knows)... it might help some models to NOT be as baffled as to WHY some random person from Peoria is drawn to her, and instead focus on continuing to BE the very person she's always been (without thinking she needs make-up, implants, more body hair, less body hair, etc.)