1)  Paying a provider, who has had a camera in front of her while she was jacking off, a multi-hundred $ premium because she now calls herslef a 'porn star'.   About as dumb as renting an Elvis movie re-run instead of one starring a consistently solid performer such as, say, Leonardo DiCaprio because Elvis was a rock 'n roll pioneer.  I am just as dumbstruck wondering how money was consistently made producing dumb Elvis movies, as I am observing self-described 'porn stars' charging 'money for nothing'.  (See recent post on Mia Isabella.)

2)  Paying providers who are known to give awful service, or for that matter to any provider without finding out if she is agreeable to what you want.  Like handing over your money, multiple times, to a carnival barker to play a game almost impossible to win.

In the interest of fairness, I do not have first hand experience with this reputed scammer beyond calling her once and briefly mentioning one of the things I like.  She gave me a direct affirmative response, but I never followed thru due to her reputation.  I don't know whether even a good negotiator would be able to get her to provide what she verbally agreed to resulting in an enjoyable experience.