Yes. There are no rules about the number of credit cards you can have at any one time, although, obviously, there are considerations around the potential to build debt and mismanage accounts in such a way that may negatively impact your credit score. It is possible to hold more than one credit card linked to the same rewards account with Qantas Frequent Flyer, Velocity Frequent Flyer, or similar program. For example, you could have a personal and business credit card earning into the same account.