From the porn stars I've seen come and go, the only advantage they have is name recognition and a fan base already established. From that point on, they either go down hill fast or flourish. Avy Scott actually started as a cam girl and her fans helped with her porn name before she ventured into the porn biz.
It all boils down to their on cam personality. From what I've seen, most porn stars don't last on MFC. Several reasons likely account for that ranging from the idiotic masses showing them zero respect while demanding to see their bobs on a regular basis to their other commitments interfering with the ability to establish a regular schedule.
Additionally, there is far less of a mystique to most porn stars. After you find out whatever personal questions you may have about them, their videos are already all over the interwebz. That alone makes it way more difficult to keep a decent sized regular fan base interested in paying for their time, attention and talents.
:twocents-02cents: