If a couple has two individual credit card accounts, they can double the amount of points earned annually. (creditcards.com)
Just as you have a balance - to - limit ratio for individual credit cards, you also have an overall ratio for every one of your cards combined. (mycreditguy.com)
Individual credit card companies will have their own application criteria and you will therefore need to check if you have a specific credit card in mind. (moneyexpert.com)