MTA almost got there as well in that week :D
Funny that it ended in a tie in the race for 1M. Skyrim started stronger but Fifa showed the better legs and caught up.
FIFA also had the World Cup going for it, with the free DLC to coincide with it, and was frequently heavily discounted (as annualized releases often are). None of that diminishes its achievement at all though. Anything that convinces EA to put more support behind Switch is a good thing. Still waiting for a Madden release... ;)