Blog

Merchant guides and strategy for getting the most from your cards.

Merchant guides · 6 min read

Best credit card to use at Costco

Costco only accepts Visa in-warehouse — but within that constraint, the spread between your best and worst option is enormous. Here's how to find your optimal pick.

Merchant guides · 5 min read

Best credit card to use at Amazon

Amazon is one of the highest-ROI merchants to optimize because almost everyone uses it year-round. The right card depends on whether you have Prime and which networks you prefer.

Merchant guides · 5 min read

Best credit card for gas stations

Gas is predictable, consistent, and one of the easiest categories to optimize. The difference between 1x and 5x on $3,000/year in fuel spend is $120 in real money.