If it costs 3000 gold to buy a rare card style normally, then why would the Daily Deals for the pain land styles (such as Adarkar Wastes) also be for 3000 gold? Especially when they claim to be 40% off? I would like some sort of refund for the gold/gems I spent on these styles because of my lack of discount.

TLDR; The 40% discount on the Daily Deals in the Store are not reduced in price at all, let alone 40%.