Although I didn′t get the coupon but I don′t care for that one anyway.
That's odd. I wonder if it was due to some regional lock on Skyrim at the time?
But you're right; There really isn't a point to the "coupon" as from what I understand you have to buy both Skyrim at full retail
and the strategy guide. $10 isn't much of any savings imo.
[edit]
@rjstone;
Just get the GOTY version. It's usually $10 cheaper for the same content. Unless you want that "making of" disc (which if it is the same one released with the collectors edition, isn't worth the added cost).