I think a great aspect about no mining is the environmental aspect. The 0tx is a great but I also wonder what the incentive would be to process transactions, perhaps it is already explained somewhere.
the following is the only comment I remember from the thread so far:
Those who care about incentives should read about altruism and its role in humankind evolution. Altruism is as old as greed, and one does not simply overcome patterns coded inside our genes.
Im not sure what game theory says about altruism. I should read this
https://en.wikipedia.org/wiki/Evolutionary_game_theory#Routes_to_altruism