coyote6
Adventurer
Well, there are problems with that, which have been mentioned above. Namely, that for older material, there's no electronic copy available so they'd have to pay the cost of making one.
I think he's referring to the Great WotC PDF Purge.
WotC did have e-copies of a lot (I'm not sure how close to "all" they were, though) of their older things. Most of them were scans, and some were pretty horrible scans (the scanned books were in bad condition in some cases, other scans were just sloppily done, etc.), but they did have them. Presumably, they still do have them -- they just aren't sharing any more.
(Perhaps they need more Barney?)