Fred93 thanks for bringing me up to date. It's not hard to figure out where GS is going with this.
They bought the old GE Capital and now we have, among other things, the online GSBank. It's pays the highest rate of any FDIC insured savings account I know (1.05%) and has about $16B in deposits for starters. So, GS sets up their own equivalent of LC, funds all the loans themselves from deposits and keeps the loans on their books. Or GS doesn't have to keep them. They can securitize them, sell them off, and repeat. Doesn't matter.
Other banks have been buying LC whole loans for years, BUT, the FDIC required them to perform due diligence as if they underwrote the loans in the first place. They would evaluate whole loans released at LC release times, not unlike we retail folks do for fractional loans, and buy the ones that met their due diligence criteria. Since GS will be underwriting all the loans then they meet the FDIC criteria by definition. Bottom line GS pays 1.05% on deposits and earns whatever% from the marketplace loans. Depositors are happy because 1.05% FDIC insured is as good as it gets (maybe GS even up's it along the way) and GS makes the spread using OPM. If they securitize and sell they can issue riskier loans. The ones they keep would probably be what LC calls A loans.
PS: Since they are a national bank they wouldn't have the Madden problem either.