He explained that customers at his 19 locations in CO and TX (and soon in AZ and DC) often don't carry cash, and they like to tip on the way out after they've eaten, which rendered tipping on the credit card receipt worthless. And when you give people this option, magic happens. Anecdotally, he says his employees at certain stores have told him their tips have doubled. D-o-u-b-l-e-d.
DipJar tells us that there are currently 600+ machines in the wild right now. But let's take Panera Bread's 2,000 locations as an example. Imagine if you could give every Panera Bread employee a $1 hourly bump in salary without changing anything other than the way customers tip. That could have an enormous effect on a lot of people's livelihoods. And Panera's just one fast-casual restaurant in the landscape -- there are plenty of others. Chipotle, Shake Shack, the list goes on.