In my experience - when I was strictly GFE I was repeatedly approached by the kinksters wanting more than (or instead of) penetration. I get the impression that a lot of guys want to try things but 1) without paying premium "lifestyle domme" prices, and 2) without having a scary woman (or man) beat them up, and 3) within the confines of a more "fluffy" booking.
I started out in 2010 offering sex. Straight vanilla sex, BJs, GFE type thing. But - apart from my very first client - I found the activities requested were "kinky". They wanted to be spanked, edged, tied up (or down), face sat (I had NO idea THAT was a 'thing' until I started this job!), babied (as in Adult Babies, again, an eye-opener!)...so my services offered changed to reflect what the clients wanted.
By around 2012/2013, I had stopped offering GFE/sex all together as 99% of enquiries were asking for domme services - all the above and more. Fisting (on them), prostate massage, breath play/asphixiation, strapon, humiliation, sissification, forced bi, forced cum-eating, hardsports, snot, vomit and more (MUCH more) were all oft requested (although mainly not fulfilled as I just can't face most of those services
). Even had a handful of guys wanting full castration
Verbal humiliation is more popular on cam/text/phone than in RL sessions for me.
Strapon is one of the most requested RL services, although I haven't ever found a harness that was big enough (and have recently gone off poking around in men's bums because the prostate massage is smelly enough even after they've fully douched/evacuated).
Body part "Worship" is a popular one too, when I'm domming, with ass-cleaning (rimming) and licking my shoes/boots clean being being the most requested.
Financial domination. Now that's a funny one. It's not as easy as some of the "instadommes" ("give me your money" bratty princess etc) often think it is. The so-called finslaves and finsubs are VERY VERY needy. If you had 1000 self-proclaimed "finslaves" queuing for you, you could easily whittle that down to 2 by setting them 1 simple test: "Please give me a fiver". 998 will mooooan and gripe and whiiiiine and call you greedy and bitch that they want to see your tits first. The other 2 will pay up. But then one of them will expect to see your tits now. The other one might play the game, for a few weeks, or months....being a needy little worm who wants phone calls 3 times a day and expects to have you at HIS beck and call.
Hope this has answered some of your questions
Just wondering - it's unlikely we will ever know the true extent but:
How popular are certain services with particular WGs...
domination sessions (with a mistress and 1 other, male / female)
i've seen much advertised, but very few reviews about them here.
That is possibly due to people being embarrassed about their fetishes etc.
but are the girls who only offer such services struggling for business?
are regular girls (gfe/pse only) being approached for this stuff.
Just thinking / wandering rather than anything else.