[denniedarko]

What you're failing to consider here is that every user Halo 3 had paid approx. $60 up front to become a user in the first place. The problem with these free-mium games is that the average revenue per user is so much lower.

[rapind]

Exactly. There's no loyalty. Users won't hang around unless they've put something in the pot. Zynga knows this though, since it's the whole premise behind their initial success.