When something sounds too bad to be true, I think it's fair that we should ask for some kind of evidence to be produced. They cite a Roosevelt Institute article that says

"Gig nursing apps MAY [my caps] determine pay by what the firm knows about how much a nurse was willing to accept for a previous assignment, how often they bid for shifts, or how much credit card or other kinds of debt they might hold."

That kind of sounds like they are overselling a hypothetical. Even just an "insiders familiar with the matter have told us that it IS happening", would make me believe it more.