Providers often run specials, so if you see a bunch of varying rates it will be hard to swallow when you have to pay the higher rate. And, this will make things uncomfortable when you attempt to ask the provider for the lower rates some other hobbyists paid...this is like negotiating.  Over time, you're going to end up seeing a provider's grandfathered rates from before she raised her prices.  All these factors will only add to the confusion.

the amount of donation for the reason listed above.  However, I often find myself wondering how long the reviewers session was.  This just might be my curiosity,  but it would give me an idea of what I might expect for a specific period of time.  And yes, the number of certain activities and acts can be quite variable (for a number of reasons), but I see how such info could be useful.  I know some ladies do not like it if a reviewer writes "I went over my time by x amount" as others may except the same.  Yes, we are asked "full, no-rush session", but I think it could be of some value if a reviewer could give some indication of how long the session was scheduled for.