LOL, this is news to me. They certainly haven't listed it as a benefit to membership, or sent notification to members, or done anything else (anything at all) to let anyone know about it.
Alex, or any of the mods (or FT or Mercury) - Can you confirm if this information is accurate?
Wow! Qualified? I bet that's news to everyone. If you have to qualify as a B&N member in order to get a sale price, I'm pretty sure that has to be listed someplace visible. If true, and they continue to deny your refund, you might want to consider contacting the Better Business Bureau or your state Attorney General.