I'm pretty sure that no one will disclose the amount of transactions that shill bidding affected. I'm sure it was way more than we think, and the scope spans over a decade. We'll never get that money back, HA will not do a thing about it.
The more relevant question is even if he says he won't do it again, how can we believe it? I mean, yeah he'll get caught if he posts it back on his site a month later, so he'll obviously be more careful, but I just don't trust the process anymore. I think for me personally, I'll be avoiding HA.