12. Commitments and Contingencies Future minimum lease payments and other commitments Prosper leases its corporate office and co-location facility under noncancelable operating leases that expire in July 2013 and August 2014, respectively. Prosper's corporate office lease has the option to renew for an additional two years . Future minimum rental payments under these leases as of September 30, 2011 are as follows: Remaining three months ended December 31, 2011 $ 103,896 Years ended December 31: 2012 416,808 2013 298,357 2014 86,569 Total future operating lease obligations $ 905,630 Rental expense under premises-operating lease arrangements was approximately $106,248 and $324,852 for the three and nine months ended September 30, 2011, and $108,539 and $322,562 for the corresponding periods during 2010, respectively. On April 14, 2008, the Company entered into an agreement with a WebBank, Utah-chartered loan company, whereby all loans originated through the Prosper marketplace resulting from listings posted on or after April 15, 2008 are made by WebBank. The arrangement allows for loans to be offered to borrowers at uniform nationwide terms. The Company is required to pay WebBank the greater of a monthly minimum fee or a fee calculated based on a certain percentage of monthly loan origination volume. On March 3, 2009, the Company entered into an agreement with a third party broker-dealer in which the third party agreed to operate and maintain Prosper's Note Trader Platform on which lender members may offer their Notes for sale to other lender members. The Company is required to pay the third party broker-dealer an agreed upon monthly fee which equals the difference between the minimum monthly fee and the transaction fees collected by the third party provider during that month. Securities Law Compliance From inception through October 16, 2008, the Company sold approximately $178.1 million of loans to unaffiliated lender members, and $1.0 million of loans to affiliated lender members through the Prosper platform wher