Just as with other genres, fetish models can make radically varying amounts per shoot.
A couple of years back, a top-flight model based in California gave me her "standard" rates, which varied from $125 an hour for bondage to $250 an hour for an out-and-out S&M scene. But those were just her rates.
For fetish "fashion," she charged much less.
Those rates could also vary for usage. If she was doing video, the rate was based on scene, not hourly. And generally the bigger companies paid her more, because they would make loads more off her pictures.
If you define the type of fetish shoot you want to do a little more clearly, you might get a more specific answer.
It really depends what you're doing. Usually models willing to portray the "submissive" role by being bonded and gaged, etc get paid way more than a model only willing to do femdom shoots (like me)
When it comes to fetish, if I can be provided with awesome fetish wardrobe then I dont even give out rates, I do tf* cause fetish wear is VERY expensive and not as accessible, and you dont want more than one pic with the same outfit thus you need tons of them. But if Im asked to model and bring my own wardrobe then I do expect to get paid. With fetish modeling it's really all about wardrobe (in my opinion)
The fetish models that make the most money own their own websites. They model for other photographers and sites (usually on a TF basis) to gain content for their own sites. And they do a lot of self promotion as well.
The amount of money they make varies according to each individual model and how much energy she puts into her website site, personal appearances and how seriously she takes herself and her business.
What I can tell you, is that I personally know of one model that earns over $30,000.oo a month from her website. That doesn't include what she makes modeling for others.
It's like any other business . . . some people will be successful and others won't.
I made around $50/hr for clothed bondage, in general, and a few times up to $150/hour for more intense BDSM scenes that involved things like impact play that left remarkable bruising. When you do something like a paddling shoot that leaves marks, you will not be able to do other shoots until the bruises go away so the pay rate is sometimes higher.