We don't have a clue.
A lot of people may have let their subscription lapse because they may have originally purchased it based on the expectation that they were locking in a good price and that the Virtual Table Top, Character Visualizer, etc were going to be coming out within the next year. That hasn't happened - no further mention of them was made, references removed, etc - so a lot of those people may have let it lapse.
But at the same time what little ever materialized from the original plan may be cheap enough and useful enough to have retained enough people to still be making money, with whatever number of new people possibly joining in for what's there as opposed to what was once promised.
We won't have a clue though, and likely never will unless someone totally breaks their NDA and tells us. And anyone willing to actually wiggle around or break NDA and discuss DDI related stuff that I've spoken with have never been in a position to know the numbers on the revenue side of things. So I'm completely clueless on any continued success or potential for falling off a cliff it might be facing. Not a clue.
Fun to speculate to death about it, but unless someone breaks NDA we won't know anything ever unless the whole thing gets canned which would be an answer by default I suppose.
