I like to think I'm a big part of the reason the forums were wiped, although I was never banned it came close on 3 separate occasions. I was let off with warnings after it was determined I couldn't possibly have engineered or predetermined the fiascoes that resulted from my actions.

I bid for 3 weeks in October 2006 when I suddenly realized I had been brainwashed, that all the loans would probably default. Turned out 3 years later that 3/5 did, but I had stopped at $300 so no loss there really, I think -$88. Whatever.
It is my opinion that Prosper is a criminal enterprise. Craig Larson had eLoan and saw that literally hundreds of thousands wanted loans, but their financial position disqualified them, either with CR, lack of income or jobs or assets. He had to reject all those apps, and there were piles and piles. He also knew they would default, and so a corporation's funds couldn't be used to fund them even if there was a way to get them their money... and so a public bidding format was devised. Win for the borrowers, win for the corporation making the loans since the funds were someone else's... but loss to the lenders. Hence lenders were never the customers; borrowers were.
Never mind that this was an illegal security subject to SEC regulations... that would be to deal with later. In the meantime, launch a public relations blitz, get yourself a few awards by stuffing ballot boxes with scripts, have a few splashy events complete with videotaping, make a big web entry.
Add to that I believe management knew of this... hence John Witchel always stating there are no resources, changes can't be made, its a shoestring operation... they KNEW it was going to fail, that the borrowers would default, and it was therefore senseless to pour any money into operations.
Collections were always mostly non-existent, when specialists were hired they never accomplished anything, when something began to be a bother and sap any resources at all, they were stopped or shut down (forums and others).
Unilateral changes to lenders agreements and other changes that were made illegally without consent, unethical management, and a host of other problems should make investors turn and run from this operation.