Kick in the teeth for anyone who paid full price, especially recently.
Wouldn't this stance then apply to pretty much all discounts, anywhere? Therefore, that stance is rather invalid. There are quite the number of discount codes, and you can pay 10-15% off usually. Another 10% off as a special deal is nothing too drastic IMO.
Yes, regardless of the time or what the product/service is.
Just sell it for what it's worth in the first place.
If $seller can sell it for that and make a profit, why isn't it just that price all the time.
$seller would get more sales in general then, and not have to jump on stupid marketing bandwagons.