I would supoena:
1)All 520k+ Prosper members. (If court procedural rules limit the number of people I can bring in or it's limited due to cost constraints, even .1% of that amount or 520 people is a lot. This would be split 60%/40% between lenders/borrowers)
2)The Prosper VC's.
3)All current/former Prosper employees
4)All former employees of Red Gorilla.
5)All current/former emplyers/friends of Chris Larsen, John Witchel, Ed Giedgowd, Kirk Inglis, Catherine Muriel, Chris Denend, Doug Fuller, and Thomas Pigowski up to 10 years back.
6)All current/former employers/friends of the Prosper VC's up to 10 years back.
7)All current/former employers/friends of Prosper Shira up to 10 years back.