Mastercard see to be doing some discount offers now for Debit Mastercard holders in a similar style to Amex and Amex Connect.
Deals at the moment are:
$10 off a Crust Pizza order of $40 or moreSOLD OUT$8 Event Cinemas, GU Film House and BCC Cinemas standard tickets for use at any time except after 5pm SaturdaySOLD OUT- 5% off the fare component of Economy and Business Class Saver fares, 8% off the fare component of Economy and Business Class Flex fares and 10% the fare component of off Economy and Business Class Flex Plus fares with Emirates
Free Bavarian-sized Pretzel with every Oktoberfest bier at Munich BrauhausSOLD OUT- 12% off Expedia hotel bookings
- First recharge on the Kogan Mobile XL Plan for $4.90
I'm not sure if this is a one off thing with these deals only, or if they'll be adding new deals as Amex does with Connect.
Terms and conditions for all the offers are here.
Thanks OP might make use of some of these :)