Of course, the mistake they make in that calculation is that they don't regard season ticket holders as paying customers.
As an example, if I pay 400 quid for a season ticket for 18 home games, and then have 2 home Cup Games added as a bonus, the club is getting 20 pounds per game from me (instead of the 22.22 per game they'd get without the Cup games).
They make it sound like season ticket holders contribute nothing to the split that is being paid to the opponents.
So the loss isn't quite as bad as the article makes it seem. It's more of a budgeting issue when it comes to accounting for the season ticket income.