This sounds like how PMS sometimes tout the number of tickets per sprint. It's not a relevant metric, and it's easily gamed

How many of those prs were small fixes? How many went to low used services, or services only used internally?

They clearly have strong set of tooling for dev ops stuff, and I do believe that stripe has strong technical chops, but this number does not show that they are delivering value. It just shows they are delivery something... Somewhere