Vulcan salute Leonard Nimoy for the "Star Trek" episode "Amok Time", which was the first episode with Vulcans other than Spock. Nimoy wanted something to help develop the Vulcans sociologically and suggested that Vulcans have a gestural greeting. He then proposed the (now globally-recognized) sign. The accompanying spoken blessing, "live long and prosper" – ""dif-tor heh smusma"" in the Vulcan language (as spoken in "") – also appeared for the first time in "Amok Time", scripted by Theodore Sturgeon. The less-well-known reply is "peace and long life", though it is sometimes said first, with "live long and prosper" as the reply. The
Prosper Marketplace and distributes borrower payments and interest back to the loan investors. Prosper verifies borrowers' identities and select personal data before funding loans and manages all stages of loan servicing. Prosper's unsecured personal loans are fully amortized over a period of three or five years, with no pre-payment penalties. Prosper generates revenue by collecting a one-time fee on funded loans from borrowers and assessing an annual loan servicing fee to investors. From 2006 to 2009 Prosper operated a variable rate model. Prosper acted as an eBay-style online auction marketplace, with lenders and borrowers ultimately determining loan rates using a Dutch auction-like