Heh, I think we could go on and on with the "why should XYZ have to subsidize ABC" argument, since at the end of the day it's all a big circle.
I'd be curious to know how much it costs UA to carry a 50lb. suitcase on a transcon, for example. If it's substantially under $25, I think this'll hurt them more than anything since $50 seems steep. Seems like they're just getting greedy.