I don't disagree about the adoption / number of transactions statistics. But the github metrics might have some value - basically this is an attempt at analyzi

I don't disagree about the adoption / number of transactions statistics. But the github metrics might have some value - basically this is an attempt at analyzing the adoption of 'programmable cash', and in that sense Paypal is one good example of a set of APIs that can be used to create dynamic payment flows that weren't (easily) possible in a global way previously. Given that angle though, perhaps it would be more interesting to compare the usage of Stripe libraries on github - which is arguably in the same space (and achieving results by abstracting the existing, well-adopted financial systems, rather than replacing them).