Shemeska
Adventurer
This analysis left out DDI.
Considering that DDI is producing millions of dollars of gross profit for WotC (estimate based on current subscribers that also use WotC forums, so in fact might be much higher), I think this analysis falls short of seeing the whole picture.
We don't however know how much profit the DDI is producing since we don't know its current expenditures for development, nor do we know if they're in any way having to work against the expenses incurred during previous iterations of the DDI (which even at the best estimates of DDI subscribers, will be a long time).