Why is this even so popular today? Vodafone started it years ago.
The rest of the world is still working on "fintech"... They don't like to talk or hear about M-Pesa. So each time they do, it's a bit of a shocker.
An article from 2014 at bloomberg talking about it:
http://www.bloomberg.com/bw/articles/2014-06-05/safaricoms-m...