For me I would say the fetish ultimately ends of being "service". Interesting I will pay for a service provider where what turns me on is to role play "servicing" her, so this may involve DATY, face sitting, golden (the last two not tried yet). But, I want to end with gfe and I seem to find providers are either is all d/s OR gfe. The few providers who do both are very expensive. It would be nice if there were more good looking providers who made the domination/fetish part of the gfe experience. One thing though - does this add another layer of pretense to what is happening? I think one reason more providers don't combine is that they are not turned on by fetishes, perhaps quite the contrary and therefore, don't need to make their job any harder than it already is. This makes the search for hobbyists that much harder, to find a provider who really enjoys (or pretends really well at least) the fetish And the GFE.
This is actually the subject that I had discussed with few ladies who offer both GFE and Fetish services and problem seems in advertising. There is such thing as True Fetish GFE ... I had pleasure of doing doubles with such Lady recently. Unfortunately she lives on West Coast
So my personal approach to this dilemma is to have few "fetish" like photos added to portfolio as well as mentioning "fantasy dates" in my weekly ads when i do them.
As for adding "another layer of pretense" .. not for those of us who truly enjoy role playing. It CAN be a lot of fun. But both client and provider have to be very much aware of what is to transpire during the session.
Sometimes the client may thing that specific fantasy is what he wants and desires, but in reality it does not really work for him.
Here is example of what i am talking about - someone wanted a session where in first half of the session I was to act as Dominant Boss and in second part I was to be Submissive Nurse.
We did have amazing fun, but the dynamic of the session would have been even more amazing if he switched the scenarios.
Hope this helps
Lina