NO NO NO NO NO
TELL HER TO NEVER EVER EVER EVER GIVE ANYONE ACCESS TO HER PROFILE. THERE IS NO ABSOLUTE REASON A PREMIUM MEMBER NEEDS A MODEL'S ACCOUNT TO PROMOTE.
She needs to report that user to MFC for trying to scam her. ASAP. He is trying to get either her doxxx (name, social security, location, GOVERNMENT ID), her payment information, or hijack her account for whatever reason.
If she wants to learn how to promote her account, there are plenty of threads here on how to use twitter or reddit for promotion. Or if she has questions, she can ask us. Maybe get verified for juicier tips and support. These are things she can do easily by herself without the help from some random internet dude giving her promises he more than likely cannot and will not deliver on.
This part freaks me out tf out. I have to reiterate. No one should have access to her account even if they are regular. I'm not trying to shame her, I'm really worried for her safety. That is hella dangerous.
I'm glad you posted asking this. I recommend sending her this thread. If she is new, there are lots of things she can learn here as well and how to be safer with her online activity.