Oh, it's possible I'm wrong. But DDI tells us the number of subscribers it has, and from that we can work out a minimum value for the income it's making. And it's been checked that the number of DDI subscribers drops every time someone leaves. So either there are literally tens of thousands of fake DDI accounts for testing purposes or DDI is still making almost $6 million/year.
I'm aware of all this. That doesn't mean you have enough data to actually calculate anything near the true total.
Again, I don't know.
One possibility is that you are right.
WotC is making all this money and they have made calculating it a trivially easy process based on nothing but publicly available numbers.
And, despite income as big as the rest of industry, WotC decided to gamble the whole thing on a new edition way, way sooner than anyone expected.
And as the popularity of 4E wained, DDI remained remarkable resilient.
And as 5E was announced, DDI remained remarkable resilient.
And as 5E becomes the new shiny that is right upon us, DDI remains remarkable resilient.
And, as DDI remains remarkable resilient and even with 4E effectively gone it still brings in as muc revenue as the rest of the industry, BUT, WotC decides to go a non-DDI route for their new game.
For all I know, all of that is true.
Or, it is more complex and WotC has decided to obfuscate their actual revenue from trivial public review and make future business choices based on past lessons learned.
I don't know.