Getting caught up in lawsuits does indeed raise levels of cynicism. But IIRC, Andrew was always wary in the old forums about promising more than would, in the end, be delivered. Then, when he saw that Prosper was fulfilling less and less of the things Andrew forecast, he may have decided to start erring on the side of silence.
So I see it as playing it ultra-safe rather than conspiring to perpetuating lies.