It will be interesting to see if anyone "new" ever passes up the top 20 bidders. I vote no.
Oh I don't know about that... There's probably another reguyincali-type who figures they know the secret that the rest of us are too dumb to see... Becoming a "used car mogul" might be too much of a temptation for some... "I hold the paper on 100 used cars across the country" they'll brag to their friends... Without, of course, producing any of said papers. 
I dunno - the Top 10 were the Top 10 for what, a year after they quit bidding and before Prosper went quiet? Seems someone would have taken over after they quit bidding - but no one did. I think Prosper burned too many bridges.
Birds of a feather being what they are and all... I'm sure they shared their experience with more than a couple of friends.