[huggah]

I think the larger concern is that by providing good gaming resources for older material, they boost that at the expense of their newer profit centers. After all, gamers have a limited amount of time.

However, I agree that this isn't really that much of an issue. The audiences who will grab the new stuff are (as you pointed out) largely different than the ones who will buy the old stuff. Also, a lot of gamers, both new and nostalgic, will buy the old stuff to read and enjoy, but not play much and will continue to buy WotC's new material.