I think the problem is, lets say 20 years from now, we now have a carbon negative economy. If we just look at the past trend lines, we would have to look at the future trend lines "each kid you have reduces carbon output by..."
In the long run, its an over simplistic representation.
Giving someone a reward gives them some Reddit premium, including coins they can spend. Wouldn't be surprised if they relaunch it, in a way where everyone loses
Don't pretty much all phones have OLED screens?