Yossie probably couldn't care less about getting her concerts postponed... She gets the money on monthly basis anyway 
She's not pissed about the money, she's pissed because postponing an event for which HER fans alreday paid, and HER fans were waiting for, is in her eyes a disrespect to those fans.
And UFA is pissed
Well, coming to think of it, from a business point of view (personally I wish Nono all the best in the world), I understand UFA, and if it were my company, with 40+ other girls to watch over, I would do the same, set an example, so hopefully the rest of the girls will at least be more careful. Whatever you may think of UFA, if there are rules on the contract, and one of the parties breaks those rules, then the penalties on the contract must be enforced.
And the consequences are not only for Nono, but for the rest as well. From now on the girls will have a tighter control over their time. So in fact, Nono and Aibon screwed them all, causing their limited freedom of movement to be limited even more.