I don't believe that is what people were actually grumbling about - it was the lack of notice that tickets were going on sale. At least if everyone is given advanced warning, they can make other arrangements for someone to buy tickets on their behalf if need be. If tickets go on sale without any notice, especially during general business hours, of course people are going to be upset if they sell out before they even get home from work. I know I would be hugely disappointed in that instance.