It's rather a cousin to the 180 and Plan B.
I think it makes a LOT of sense. You have to draw your boundaries and have (and enact) consequences for boundary violation.
But you're asking if it "works." What do you mean by "works." There is no foolproof way to get a person to stay in a relationship if they truly do not want to stay. None.
But there are ways to regain YOUR self-respect, YOUR equilibrium and make YOUR needs known. Whether it happens in your current relationship or not, you are much healthier for being true to you.
I think when we focus on the WS, we lose focus on what is important and that is YOU.
Did you know that most WSs say that they had MORE respect for the person who stood up for themselves and made it clear what they would and would not deal with than those who tried to "out-nice" them?
Out-nicing is a NO-WIN scenario.
You're much better off packing his things in lovely matching Hefties and telling him to scramola until he corrects his rectal-cranial inversion.