Do you get St George, Bank Melbourne and Bank SA sign up bonus if you already have one of them?

Currently St George, Bank of Melbourne and Bank SA have 30,000 bonus points with no annual fee for their Amplify Platinum Card (they are all owned by Westpac and offer the same cards). Would someone be eligible to receive bonus points for all three of these cards if they applied for all of them or would the 30,000 bonus points only be credited from the first credit card that was applied for?

#Bonus points promotion: The bonus points promotion is available when you apply for a new Amplify Platinum or Amplify Signature card between 30 September 2016 and 4 January 2017 and spend the minimum amount of $2500 on eligible purchases within 90 days from card approval on one or more transactions. Existing Bank of Melbourne customers who currently hold an Amplify Platinum or Amplify Signature card or who have held one in the last 12 months, are not eligible for this offer. Eligible purchases do not include fees, cash, cash equivalent transactions, BPAY transactions, refunds and balance transfers debited from the card account. The bonus Amplify Points or Qantas Points will be credited to your points balance within 12 weeks of the eligible spend criteria being met.

Both the Bank SA and St George website only make specific reference to that particular brand like the above statement.

It might work but I’d say it wouldn’t, based on the fact that it would be the same credit department for all 3 brands (probably 4 including Westpac). I would guess they would auto decline all the apps if they came through around the same time or at best approve 1 of the cards, not to mention what it would do to your credit file.