Drew knew about the pimping, as Hunter would send her to check up on conquered households to make sure things were going smoothly. However, I'm pretty sure neither Hunter nor Drew were planning to pimp out Ophelia and her family. Fuck them, yes, but not pimp them out.
I think the cameras/streaming was a new scheme limited to Ophelia's house, and Drew didn't know about it. She reacted angrily after Hunter's confession, calling it a "pornographic Real World" and threatening to stomp his face in.
Drew recognized "the mixture" in the wine bottle, so I think it's likely that Hunter has used drugs in the past, but perhaps only "when needed", like when faced with more resistance/obstacles than usual.
It seems to me that Drew only knew part of what Hunter was doing to their own family, and only begrudgingly went along with Hunter until she learned the whole truth. I think there's a strong case for Drew's redemption, but it hinges mainly on the details of the alleged affair with David.