pkt77242
Explorer
The player stuff is all we need.
There are a half-dozen Greyhawk products available here:
DnDClassics
Most major Greyhawk fans already have all the setting books they need. More are superfluous and would just cause debates from people who liked the setting before the Greyhawk Wars, those who liked the changes, the people who liked the lore changes for Living Greyhawk, and the people who hated LG.
All fans need is the unique setting crunch. Full setting books only accommodate new players, and those will likely find the Realms useful enough.
If WotC starts promising new settings people will hold off getting FR books to instead wait to see if their setting gets some love. And that's bad for sales.
While I agree that "could" be bad for sales, I think that your idea of putting the info in a digital magazine would be rather bad for profits, as it would only get them a minimal amount of money (say $5-10) when instead they could sell a campaign setting for $20-30, while they wouldn't sell as many due to the cost they would most likely make more money especially if they went with PDF's for the less popular campaign settings.