I direct you to my post in that thread. Basically the definition of what a slave is has changed. Not just on an individual level but to the more widely known BDSM community. It no longer simply means to take someone against their will and hold them prisoner (though of course that definition also still applies). It means so much more then that to many. Which will be different on a case by case bases due to those involved having their own meaning with each other. Just try not to confuse the two with each other because they both have the same name.