I'm dubious about that graph.<p>It's suspicious that it's a graph of cumulative downloads. Cumulative graphs always go up nicely. But what matters is downloads per month. Someone with good monthly numbers will rarely resort to showing cumulative ones.<p>It's particularly suspicious the way the number for December, which we're only 6 days into, lines up exactly where it would if they were seeing hyperlinear growth. You'd have to time your post almost to the day to make it look so neat.<p>I would be very interested to see an ordinary graph (i.e. without graphic tricks to make it steep) of downloads per month. That would show us what's really happening.<p>I wouldn't be surprised if what that graph showed was linear growth (which is bad, because it means a decreasing growth <i>rate</i>), followed by a massive spike in December due to a special promotion.