From Wikipedia, he was the CEO after the merger who decided to shut down online banking and focus solely on PayPal. It sounds like he had a lot to do with it.
Maybe quote the part of the article that makes you think that?
They created and launched PayPal, and it took off (i.e. got traction on eBay), before the X.com merger.
> 1999–2000 December–February Customer focus shift Confinity identifies eBay as a promising area to acquire users, because of the high concentration of buyers and sellers and the absence of any standard payment system for them to use.
