I have idea about new app where you can share parking ticket. I don't know what other cauntries but in the Czech Rep. have lost of parking places where you must pay for half hour or more. Some people left before time and somebody need stop only on 5 min.
They can help and save money. And if this app will be popular, You can see on your phone where are occupied parking places. I think, when will be good price ,this app can be successful, because you save money and nobody like parking fine :D sorry for my english !