Yes, I'm in with you Muse that there's no single definition (any more than there's a clear definition of "hetero vanilla sex") only I don't think that's the intention of the writer, nor the point of Rhabbi in posting this. To my mind, it works as a starting-point to try and gauge: what's my turn-on in this? How far do we really want to go, now or in the near future? If one is on a high and having a great time, bound, gagged and totally turned on, yeah right often one will feel "I'll do absolutely anything for this guy, serve Him in anything..." without really meaning it full-on perhaps (if your Master grew mentally ill, though stiil undiagnosed, what then?)
You know as well as I do people in the BDSM community make very different use of words like slave or owned: to some it implies total. live-in control and basically no limits (no other conditions), to others it's something that really demands an on-going consensual factor, checked tightly: the slave may be pushed, whipped, used, but can't really be regarded as mute dumb property. I don't think either of us would buy the view that to be a slave you have to give up évery right to object to your Dom/me, to keep any limits, or to have a life outside of your slave service (and btw I think the point where the author of the document above says the traditional housewife role "basically equalled a sex slave" - because rape within marriage was not recognized and the wife worked at home? - is really misleading; she's relying on radical lesbian polemics against the traditional family here).
It works as a sort of white paper to get down to see some of the patchwork of things you're into and what might be coming next. Being a branded slave with long experience you clearly don't have much need for this kind of thing, I feel it clearly needs to be worked over a bit too, but it seems a useful discussion to me.