Most of the tokens that I have come across before do not offer real use. But I like the tipping app idea
I would not call tip a big problem in society. If necessary, I can send money to the card directly to the waiter using the qr code. But no one does that, everyone has a cash
I don't know about you dude, but I only pay by card. And in this case it is impossible to thank for the service. When you don't take cash with you