"In 2011, James moved over to PayPal, first as vice president of global product development and, beginning in 2012, as chief technology officer. In 2015, he expanded his role to also lead the Payment Services business in PayPal, a global team that powers the efficient movement of money and rewards into, out of, and within the PayPal network."
So, he was CTO/Infrastructure Guy, then they added on SVP Payment Services some time last year, which sounds like it has a lot to do with overall performance.
...and Senior VP Payment Services.
> why would infrastructure guy ever be held responsible for poor overall performance?
Payment Services is a pretty central business function for PayPal.
A CTO that is just an "infrastructure guy" is not a CTO by any measure I've seen.
ALL C-level's are responsible for company results.