San Francisco based nonprime online lender LendUp has raised a $47.5m Series C round, led by Y Combinator. Valuation on the round was $500m. The company was part of the Y combinator batch in Winter 2012 and is looking to begin its push into credit cards with its new L Card.  This is the 3rd time this year that lendup has raised money , taking on $100m in debt and a $50m Series B in January.