Is there any (theoretical?) work on "gamification" in game theory?
I do not have a proper definition of gamification, but StackExchange would be an example. Contributers like us provide a costly service without monetary compensation, but in exchange for fictional reputation points or badges that do not mean much -- other than it being fun to obtain them. I certainly would not post anything without the "game aspect" implying a certain non-monetary payoff that can be designed. Moreover, it is different than other non-monetary services like organizing workshops or refereeing, which at least have real-life consequences for my professional reputation.