Young millennial male, every single person I know uses Venmo. IMO this article largely misses the point of the app. It's replaced cash/checks is all, it's not some huge social upheaval in the way we use money that needs to be analyzed. In my experience it's rarely used for splitting bills for dinner or picking up bar tabs (I can't remember the last time I went somewhere that wasn't able to split the bill on their end…
Young millennial male, I'd never heard of this thing until now. These things tend to be emblematic of poor local banking infrastructure. This reminds me a lot of echocash[1].