Maybe because that isn't Early Access.... Tyrok is right and maybe you should be more considerate to listen to him
From the FAQ on GCU in regards to BF pricing stacking with GCU:
"Any early access offers to those promotions are also excluded from combining with the 20% discount."
This is not correct. Horizons and Uncharted Lost Legacy are both BF games and they sold them under an "Early Access" sale. So Best Buy is not fully blocking GCU from stacking. I am not complaining and anyone who sees a good price should jump on early. But if Best Buy and Amazon all of a sudden have the same price on something, I would most definitely get it on Amazon for the fast shipping and incredibly great customer service with no hassle on returns--even on opened software.
So no, I am not going to be "more considerate" when this is just false information. Best Buy is violating the policy they created. Saved me $10 or so.... so I am not complaining though!