That or the op has seen some dominants use the term when refering to their slave during humiliation play and decided that "whore" is also a bdsm titular reference?

Though based soely on the op's actual post, it seems that a compare and contrast is assumed?

Strictly historically speaking, there were quite a few societies who had slaves who were also prostitutes. Some even kept a portion of their earnings for themselves.

Some clairification would be nice.