My own humble views on this topic is I don't really see it as a religion but that doesn't mean one cannot use it in their religious pracitices. There is one thing I have the urge to point out is where yes submissives/slaves hold their Doms/Masters/Owners in high respects they also know that their Owners are human and therefore also make mistakes as well as need support and everything else that humans need. Some, I am guilty of this in the past, forget that Doms are human and elevate them to a higher level then they really are. Is this a bad thing? in some cases it is because setting someone so high up will eventually have them come crashing down in the subs eyes at some point (in general). So, yes the kinks of queening and "whorshipping" feet and other body parts are out there, I do not think it is the same as what I do in my faith with a higher being that isn't human.
To slightly touch on my views of how one would use kink in their faith, if I'm not going too far off on topic, would be using kink as a tool to get to a goal/place in ones mind (I really hope I am saying this correctly). For example, One path that is out there is known as the Ordeal path. This is where one goes through an odreal to get to an altered state/other reasons. Having a scene set up with a person that is more intense and both parties are aware of the goals allows the kink to be used as a tool in one's ways of practicing their faith. That's one general way I look at mixing kink and my religion, but I would never call bdsm my religion.
~RK~