2 million "game sessions" is NOT 2 million people. One player playing 5 games that day is playing 5 sessions.
All I can say is I get the attraction to online. A game like Call of Duty, I play online amost exclusively, but it's a straight honest challenge in my book.
Football sims, unless you solely restrict yourself to leagues of disciplined sim players, aren't about the sport of football at all, but about the exploits. Truthfully a significant portion of the young players either never played the sport IRL or very little, too little to understand realistic strategy.
So, if you want to squeeze some online games in during your free time and you're taking whichever guy you get connected to as your opponent, we all know it instantly becomes about exploits and winning at all costs for most. That's why I avoid online.
But be that as it may, Madden isn't COD, and accordingly an awful large part of the community plays franchise mode for the fun of building uup a team. We just ask not to be discounted as though we don't count.