While the number of voters is still too small to draw conculsions from, already the numbers (if they are true) are revealing.
43 persons have at least one account. However, those 43 people account for 63 accounts. If that is site-wide, Prosper is overstating its membership by almost a whopping 50%...
Your post was so unclear, I had to do the math myself.
As of the time of writing this, 50 people have voted. They owned up to owning in total 64 accounts. 6 people had no account, 30 people had one account (30 accounts), 8 people had 2 accounts (16 accounts) and 6 people had 3 accounts (18 accounts).
Assuming the 6 people with no accounts are not counted as Prosper members, then Prosper would count 64 accounts for 44 real members. That would overstate membership by 145%.
But you really can't blame Prosper for this. They don't really have a means to figure out when people register their dogs or WonderWoman. Clearly, also unaccounted for in the membership numbers are those accounts that registered as part of identity theft fraud. Those should not be counted either, but how do you go about identifying them?