The problem with asking for the rate is that a lot of ladies may feel uncomfortable with this, as It can be incriminating. If the lady has screened you and feels comfortable she may talk about her rate and even her activities with you, if not she will (should) refer you to her website for info. If she refers you to her reviews, that's where it can get kinda ambiguous.
If a lady is saying she is GFE and PSE AND has a different rate for those, then she should explain it. I have always understood PSE to be CIM and Greek included. Obviously not all porn stars do those activities, but this is the hobby and we merely use acronyms to shorthand activities.