[JohnK]

There is so much information on credit cards on this site.

Not sure if Campbells accepts AMEX but it appears to be the best one for accumulating Membership Reward points without imposing any cap on the amount of MR points earned. There is the AMEX Rewards Maximiser credit card earning 1.5 MR points for every $1 spent, the Qantas AMEX Ultimate credit card earning 1.5 MR points for every $1 spent or the Qantas AMEX Premium credit card earning 1.25 MR points for every $1 spent.

There are other credit cards recommended with some earning 1:1 points. Citibank Visa gets a mention regularly.