Monique wasn't blackballed because she refused to promote the movie. She got blackballed because not only did she not promote it abroad, she went on rants online (just like now) about how they expected her to work for free - and got on stage and said that Oprah, Lee Daniels, and Tyler Perry that they could s*** her d*** if she had one.
I'm glad that Whoopi pointed out to her that it's not the same thing, and she TOLD HER everyone promotes their movies for "free" what Whoopi couldn't say (because they ran out of time) is that they get per diem, and other perks like free clothes, jewelry etc. She's just mad because she didn't and apparently still doesn't understand how Hollywood works. I heard she's a nightmare to work with.