Elon needs to buy HN and open source the algorithm! /s
The risks seem really obvious after everything falls through but there are plenty of other companies that are "obvious scams" who happen to have made it by luck/skill/investment.
The risks are obvious the second you see that they offer 15% yield, which is roughly DOUBLE the current yield of the average junk bond, and about QUADRUPLE the yield at the time YC closed.