...I could be completely wrong here but maybe what I'm about to say will help.
First there are no restrictions on the way a client chooses to rate a provider he sees on Appearance. If he thinks she is a 10 then he can rate her as such and TER won't have anything to say about it.
TER does have some services offered restrictions on performance ratings though. The highest a provider can receive for performance is 7 unless she is willing (offers) to do one or more of these five things.
1. kiss with tongue (TER terminology)
2. blow job without a condom.
3. be really bi
4. do anal intercourse
5. do more then one guy at a time.
She is eligible for 1 extra point in performance for each of these she offers. She can't receive a performance rating higher than 10 even if she offers all 5 of the extras. Take the 7 add the points for extra services (any 3 of the 5) and the client can rate her a 10 in performance. (Note: she doesn't have to actually do any of these 5 things in the session being reviewed she just has to offer them if the gent so desires. What sense that makes is another discussion for another time.)
I've quoted the sections of the Review FAQ's below. There are two sections that cover this. The first only mentions 4 extra services the second names all 5.
"An escort provider is only eligible to earn up to a 7, unless she is willing to perform one or some of the following during a session: Kisses With Tongue, Bare-Back Blow Job, Really Bi, and Anal Sex. For each of these services that are offered, her potential max score is raised by one point, with 10 as an absolute maximum."
"In order to keep our performance ratings consistent, we set up the following system: An escort provider may only earn up to a 7, unless she also performs the following during a session: Kisses With Tongue, Bare-Back Blow Job, Really Bi, Anal Sex, or More than One Guy. The addition of each offering will raise her score by one point. If your review doesn't already accurately reflect this rating system, we will adjust it.
This does not mean she earns extra points for offering these service(s); just that she is now eligible for a higher score. Her maximum eligible score is based on what is offered, not what is performed during your session with her. You may or may not be interested in the “extra” services she offers, but the fact she offers them makes her eligible for the higher score."
I hope this is helpful in understanding the review ratings of providers.
edited to add the Review FAQ's link
-- Modified on 7/3/2014 11:31:41 PM