I don't fly every week. If I need to buy a ticket I have no idea when the price last changed. So if the price is $5 higher than it was last week, I don't even notice. All I know is that the TV commercial said $29 but I'm paying $75.
Besides that, prices vary depending on what site you book it through, time of day, how far out you're booking, and all the other factors airlines use to calculate variable prices. So like I said, "normal" travelers won't be upset about the price increase, because they won't know there was one.
People who travel a lot, or work in the industry, are the only ones who will notice when the price goes up. And they already understand why.