The citation must be to myself since I didn’t read it anywhere. I sincerely doubt I’m the only person to have envisioned clouds as a maximum entropy situation.
Which links did you follow from the wickedpedia article on Prigogine?
I suggest reading linked article on dissipative systems and the other on self organizing systems. The gist of it is that self-organizing dissipative systems (Prigogine uses river patterns on continents as an example) organize themselves such that maximum possible entropy is produced given the physical constraints of the system under consideration.
So rivers flow in such a way that they reach the ocean in the most efficient way possible given the terrain to be traversed. I’m saying that clouds self-organize into the most efficient configuration possible for maximum entropy (dissipating heat) in a system far from equilibrium.
Adding CO2 to the atmosphere is then equivalent to putting an obstacle in the way of a river. The river will find the most efficient way around the obstacle. Similarly clouds will adjust to find the most efficient way to dissipate heat.