Let's start by giving back. Out of the interviews I held with car owners in Amsterdam it was a clear giveaway that no one wants to just give away their parking spot. It's safe to say that it is one of the more valued things there. For electric cars it's less of a problem since they have their own exclusive parking spots, but they are limited. That's why electric car owners tend to leave their car on those parking spots for the whole day.
This solution is a small step towards a bigger one. By directly finding and requesting a parking spot this solution doesn't become a burden. It's there to bring people to come together and share. As an incentive users receive a reward for giving their parking spot based on when they react to the request.