Ooops. Based on my understanding, the context of "attachment" rate from Square Enix (and other 3rd Party Publishers) is based on 3rd Party attachment rate.
For 3rd Party Publishers, the attachment rate of 1st Party Games is not too relevant.
You have to note where he is coming from. If most of the Wii Software Sales, especially the highest selling ones are published by Nintendo, then as a 3rd Party Publisher, it does not look as good to them. Business wise, you have to take this into account.







