700 gold for five wings (assuming I don't get my free wing the first week, which would be the only way you'd spend '25 bucks' anyway) comes out to 3500 gold. That's 35 packs of cards, which would cost me around $43.75 if I were to buy them in bulk. So spending 3500 gold on all five wings actual ends up 'costing' me more, based on the value in $ I'm getting for my g spent.