Not so sure about the quality of these. Tickets can regularly vary by a factor of 20x in how much work is required to implement them, thus the reason we included them in our list of "four metrics that agitate developers."

"Deploys" doesn't measure individuals, and like commits, they are an eminently game-able metric.

Documentation written is a pretty good metric, but if one isn't careful, they'll just be measuring lines of code, which isn't ideal.

BTW, I started using your product about a week ago on the advice of a friend. It's an awesome idea, really excited about its potential to reduce busywork.