Greyhawk PDFs: D&D Classics

With all the talk about 5th Edition ramping up toward release, I took a moment to look at Wizards' ongoing release of out of print D&D material on PDF over at their D&D Classics site. Usually every week one or two old Greyhawk products are rereleased for sale there, like City of Skulls and Treasures of Greyhawk last week.
As the top 100 hottest sellers list shows, Greyhawk is in demand for download (based on copies sold divided by days on sale):


#4 City of Skulls
#12 Temple of Elemental Evil
#14 Treasures of Greyhawk
#21 Against the Giants
#32 Vault of the Drow
#36 Descent into the Depths of the Earth
#39 Queen of the Demonweb Pits
#40 From the Ashes
#51 Sinister Secret of Saltmarsh
#66 Greyhawk Ruins
#68 Against the Cult of the Reptile God
#71 Iuz the Evil
#77 Danger at Dunwater
#79 The Final Enemy
#80 The Village of Hommlet
#90 Return to the Temple of Elemental Evil
#92 The Hidden Shrine of Tamoachan
#98 The Secret of Bone Hill

That's 1/5 of the totality of published D&D to date. Not too shabby! By comparison (cause why not) Forgotten Realms only has six products in the top 100 and five of them are from 4E. Weird, at any rate classic settings Dragonlance and Mystara are also hot items on this site. It means nothing overall to the future of D&D, but it is good to see the classics outdoing the flagship in this respect.

Update 05/31/2021: No update, just a comment that I'm sure by present day way more of the classic D&D collection is available on this site. It's nice to see that Greyhawk led the early wave of releases.