Your analogy make's no sense whatsoever as you fail to account for the fact that I purchased the box editions. Lets make it better shall we.
So I go into a shop to buy an Ice cream I pay for the actual base icecream (Expansion or original game) and then I also pay a small fee to the shop owneer to access of the extra toppings (Subscription fee). Note that I paid for the extra toppings with a small fee every month
Now the shop owner creates this brand new topping, but instead of giving it to me like he has in the past (because I gave him a monthly fee) he now decides to charge me twice the monthly fee to use this extra topping on my ice cream.
How is this charity? How is this fair? How can you possibly justify the shop keepers actions as anything other than a way to try and get more money out of his customers?