I think of it this way:

I purchased a video game that I was very lucky to come with an online portion. I paid for the game, was able to play a killer game, but they threw in an MMO on the side.

What do I have to complain about? Let them work it out, since it is a free game for everyone. They could have charged for another game and made it into:

1. Those who play Single Player

2. Those who play online

3. Those who play both single and online.