Doubling your accounts is the most underrated way to earn more points fast, especially for families who want to travel without doubling their spending. • Credit card points and miles hobbyists can double their rewards by using a "two-player mode" strategy with a spouse or partner • Each person has their own credit score and ability to open cards, allowing couples to earn twice the signup bonuses • When deciding which partner applies for which cards, consider credit scores, 5/24 status,...