Or, perhaps they thought this thread was some kind of harassment, and the usernames were removed under those grounds?
That does seem the most likely.
A silly reaction, but there it is.
That would probably be Prosper's public story, but it makes no sense. There was no "PII" involved, or any harassment. It was simply a discussion about some very mysterious happenings with the first loan and second loan listing of Prosper's CFO -- certainly fair game for discussion by any reasonable standard.
Deleting past screen names in (a futile) attempt to hide the fact that the CFO's first loan is delinquent, and his second loan listing was 100% over-funded by Doug Fuller to outbid all other lenders on the listing and then immediately cancelled, something that no non-employee could ever do, raises very serious questions about what other special treatment Prosper employees receive when acting in a non-employee mode (i.e., as a borrower, lender, endorser, or group-leader). If Larsen (Anton) has second thoughts about one of his bids, can he "withdraw" his bid or simply cancel the listing, thereby getting his money back? If a credit-challenged Prosper employee wants to post a listing, can he alter his extended credit data and grade? If a credit-challenged employee endorses a friend/relatives listing, can he then delete his own listing so his poor credit is no longer visible (oh wait, that already happened once; Prosper called it a "test").