They've probably made a pittance and they've got to own the amount they received, which is minimal. An apology and removal of the document is sufficient.
Old hotness: Hasbro sucks! They won't let anyone have access to the old games in pdf. They aren't even available in any other medium.
New Hotness: Hasbro sucks! They make the old TSR products available in pdf where people can buy them!
Oh well. Fun while it lasted?

EDIT- I found a great 2012 post arguing they shouldn't provide pdfs because it would cannibalize sales from Fourth Edition. That did not age well!