[BearGoesChirp]

>They can either accept the fees that are available or not.

Couldn't the same be said of a brick and mortar store? They either accept the offers they are given or they don't. That for some item they only accept offers of exactly 9.99 (plus tax), rejecting not only lower offers but higher offers, doesn't change that the interaction can be described in the same fashion.

All the rest also applies to normal supply and demand. When you do a production run of some item, the cost tends to be fixed per item. Doing another run at a different time may cost different, and it is possible for something extreme to happen (factory accident), but in general the cost of production of a single run is the same.

I see nothing about this that would void basic economic reasoning, where things like 'reducing fees' happens in certain conditions.