RazorianFly:

While some are shocked at the sudden demise of Apple’s popular free giveaway promotions, such as 12 Days and the just axed “Single of the Week,” others are seemingly less shocked at the ending of these ‘FREE’ iTunes promotions. We think MacRumors forum user, fluchtpunkt, nails it: “I think that entitlement mentality is what has killed these promotions. Getting free stuff is no longer enough. It must be exactly what you want.”

As the piece says, we may never know why Apple has discontinued these giveaways but I would have no problem believing it is, in part, due to the epic amounts of whining from a segment of users.