GO Mastercard 5% Cashback up to $50/Month with Samsung Pay

Link not specific to offer :(
Copy paste from email.

Hey Candyman,

Simply use your GO Mastercard with Samsung Pay to buy the little stuff, like milk, butter or eggs for your big stuff, like a fridge, and you'll get 5% back*.

That's up to $50 back each month until 30 June 2018, and we think you'll agree, there's nothing little about that.

*This offer is strictly limited to the recipient of this email only. Open to Australian residents 18 and over. You have been specifically selected for this offer and it is not transferrable. Eligible transactions do not include cash advances, credit fees or charges, credits, refunds, reimbursements or balance transfers into your account, or extended interest free or other promotional purchases. Offer is valid from receipt of email to offer end date. To qualify, you must fulfil on the terms of the offer. Up to $50 will be credited to your account when you spend a minimum of $1,000 in a calendar month, to a maximum of $150 credited during the promotional period. The cash back amount will be credited to your account within 30 days of the offer end date of 30 June 2018. The account must be open and not in default of the credit contract when the credit is applied.