Crenshaw coined the term. I agree it describes something almost everyone knows: for most of US history, black women have had it worst. Interstingly, that has changed: https://comrademorlock.medium.com/why-black-women-are-now-privileged-but-black-men-are-still-penalized-6d208626a5c3

Are you saying that the poor women you describe as classless would not accept work to better their lives if work was available to them? If they would accept work so they would not continue to suffer, they're working class. (That's not my definition. It's the common socialist definition.)