Companies have been getting ever bolder about abusing volunteer and crowd sourced labor. When the participants are bound by strict NDAs, I think some skepticism is in order.
All we really can tell is that non-neglibigle percentage of the participants in a limited access program were creeped out enough to be willing to blow up their access to call attention to it.
I don't think this story is really even about AI at all, but about labor practices.