Will never not be surprised by how little people will accept to ruin their lives. $5k? Really?
Obviously they perceived the risk as low.
Why do people break the speed limit on wet roads just to get home a minute sooner, when they could slide off the road into a ditch and never make it home at all? Obviously, because they think that won't happen.
It's another argument, but I think it's on Facebook entirely that they don't pay their employees enough, keep them happy enough, to prevent this sort of thing from happening. When you leave content moderation to your lowest paid employees, you are only encouraging people to figure out how to game the system for more.