Looks like you applied before this specific promo, however the terms may be the same.
Amplify Signature | St.George
*Bonus points promotion: The respective bonus points promotions are available when you apply and are approved for a Amplify Signature credit card between 21st January and 6th March 2019, and spend the minimum amount of $4,000 on eligible purchases on the card within 90 days from card approval. Eligible purchases do not include BPAY or BPAY equivalent transactions, fees, cash, cash equivalent transactions, refunds, balance transfers debited from the card account, government fees and ATO payments. Existing customers who currently hold a Amplify Platinum or Amplify Signature card issued by St.George, Bank of Melbourne or BankSA, or who have held one in the last 12 months, are not eligible for this offer. The bonus points will be credited to your points balance within 12 weeks after the eligible spend criteria is met.
Amplify Signature | St.George
*Bonus points promotion: The respective bonus points promotions are available when you apply and are approved for a Amplify Signature credit card between 21st January and 6th March 2019, and spend the minimum amount of $4,000 on eligible purchases on the card within 90 days from card approval. Eligible purchases do not include BPAY or BPAY equivalent transactions, fees, cash, cash equivalent transactions, refunds, balance transfers debited from the card account, government fees and ATO payments. Existing customers who currently hold a Amplify Platinum or Amplify Signature card issued by St.George, Bank of Melbourne or BankSA, or who have held one in the last 12 months, are not eligible for this offer. The bonus points will be credited to your points balance within 12 weeks after the eligible spend criteria is met.