I've been incredibly impressed by Sam since he started as a part time partner at YC, as have all of the founders. Greendot are lucky to have him and his team.
Likewise. Sam is extremely effective, works super hard for YC companies, and knows something about seemingly everything. Even as a talent acquisition alone this would make sense.
Seriously...been getting a lot of help from Sam lately and it's unbelievable how insightful the guy is. If I had a billion dollars, I'd pay $43M to have Sam in my corner. ;)