Rakuten has a promotion for MasterCard cardholders. You can get a discount of $30 in Rakuten Super Points, just for using your Mastercard credit card on a purchase of $100 or more. Points will be added to your account once the order ships. These points can be used on Rakuten purchases, even for gift cards.
- Receive $30 in Rakuten Super Points after you pay for an order of $100 or more using Mastercard at checkout.
- Offer valid only when using Mastercard to complete purchase at checkout, and not valid on purchases made using Paypal.
- Valid from 12/20/18 at 12:00AM (PST) until 12/25/18 at 11:59PM (PST) or until promotional funding is exhausted, whichever occurs first.
- Points will be available within 24 hours after order shipment and will expire 1 year (365 days) thereafter. Individuals will receive an email when points are available.
You can buy a $100 Xbox Gift Card for example and get $30 back in points. Pretty good deal.