Artificially trying to increase the demand curve on optional spending never works. Those people bought cheap seats for a reason. There were already better, more expensive seats available. This is an entertainment expense. You're simply giving an even lower ROI and higher opportunity cost for people spending their entertainment dollars. It's nonessential spending. If you sold sunglasses at airports for 10, 20, and 50 dollars, removing the $10 option just makes you less likely to sell sunglasses. You aren't going to get a boost in the 20 and 50 dollar sales to offset the number of people who just say, "For $20, I can do without".
If you have a restaurant with subpar food and location that is generally half empty, you aren't going to make more by raising the prices and closing one of the ten tables inside, even if you charge more for patio seating.
Worse, even if this worked (it won't), and those seats were all sold out this season (they weren't), and the attendance won't be affected by the ongoing suckitude and growing market uncertainty (it will be), and those people ALL bought seats costing on average $10 more than before to each game (they won't), this still represents an increase of less than $515,000 over a full season. That is more than 135k LESS than an NHL-minimum contract next season. Doesn't even pay for Moss or Chipchura next year. That is perfect sales retention (actually expansion) from 1256 seats and a price increase of $10 a ticket.
It's always funny to me when businesses try to cheat the market. It never works. The market is never wrong.