If you come across a sale for superbucks, please make sure that you clicked on the Sale/Special offer button on the right side of the screen to receive bonus superbucks. If you click on the Supercity bank button on top of the screen, you will receive the regular kind of deal.
Special offers can only be purchased through credit or debit card, mobile payments, Qiwi Wallet and PayPal. Please note that Facebook gift cards cannot be used for special offers. If you choose to redeem a Facebook gift card, you will always get a fixed amount of superbucks.