Yep, your exactly right about everything you said. 
I read the FAQ for FBSM but I have more specific questions. Specifically, this ad
My name is ----i, I'm a classy, beautiful blonde! I offer a FULL body, relaxing & sensual massage. I offer discreet and upscale companionship, for those gentlemen who want the very best! I promise this will be a satisfying and unforgettable experience!
Is there any way to tell, based on the above, what exactly she will provide? Will there be an upsell to FS?
If not, is there any way to get this information from her, either through e-mail, phone or text...some code that is used to determine what services are actually offered?
Thank you in advance for your advice
But, if she has reviews, then you can find out from her clients what happened. If you PM them, you might even learn more.
If she has no reviews, then you are taking one for the team, and if you are a newbie, that is not recommended.
My guess is that she'll just do a HE, and if you are very lucky, you might get a body slide.
Some gals, after you see them for a while, and they feel comfortable with you, might add some things to the menu, but there is no guarantee.
There are no secret codes, and discussing any specifics with her before you are behind closed doors is likely to cause he to break off contact.
As MrFisher said, if there are no reviews then there is no way to tell. More often than not it will probably just be a legal massage with no chance of upgrade (not even HJ). Many people and places use those words to draw you in expecting that you will never repeat. Many therapeutic, legal massage places and people use the exact same words. The price might be an indicator of additional services, but no guarantee.
Thank you all for the advice. I appreciate it
Yep, your exactly right about everything you said.
the 'satisfying' is a naughty hint... but there are lots of scams too. Unless there's a review or someone is willing to back channel... you will be TOFTT.