Not asure I understand the apparent anger on display here by some regarding this subject. You don't like the board don't buy one. Don't like some of the scenery? Don't buy that either. You already have stated you don't read WD so why would it being in there bother you so much? And why would you even care if others (regardless of age) decided to buy these products?
If some folks prefer to buy terrain kits over maing their own that is their business and should not cause you to get your panties in a bunch. I personally like some of their terrain and dislike some of it. I make some of my own terrain (not very well) and use some purchased from GW or others such as Armorcast, but as I only buy the terrain and models I like I really do no not care what they choose to advertise in their own magazine.