Did this ever get answered?
Also people are different and our brains work different, to my mathematical / software developer brain it is very intuitive that spending to change something would mean you could spend it to change zero. You are indeed changing all your eye results, all is just 0, this is an interaction that needs to exist in software to work fairly often, when i write code to perform an operation on a set of things that set of things could be empty.
In many ways rules of a game are like code, and they should be logical well defined things, so feeling on how things should work have no place in their resolution. Of course to some people's thinking like this is obstinate or i have heard it described as "petty". Well you wouldn't be able to go on to a computer and look on an internet forum without people that think like that, so....
Anyway, what's the ruling ?