From what I remember of Gamestop's Anniversary edition post, they did indeed offer the 1 million credits - but it was a very confusing state of affairs.
What they were actually selling was the Standard Edition - but as a preorder bonus for the Standard Edition you got a free upgrade to the Anniversary Edition... or rather
an Anniversary Edition, consisting of boxart, the 20 15AE cars and gears/paint/avatar bonus. I'm pretty sure the 1m credits was on there, but I don't recall if the Precision Pack was.
Now the game is out and there are no preorders, they only sell the
Standard Edition.
Amazon were only ever selling the Standard Edition, with a 1m credit bonus. Apparently this was only for preorders - they now only sell the
Standard Edition - so it looks like no retailers in the USA include the 1m bonus now. Meanwhile (physical copy) Anniversary Edition buyers in Europe still get it off the shelf...
The USA kinda got stiffed on content this time around.