This guy has 45 credit cards. Here’s what you can learn from his strategy.

Dave Grossman carries a “Costanza wallet,” and he says he’s reaped rewards aplenty as a result.

Jun 26, 2025 - 18:41
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This guy has 45 credit cards. Here’s what you can learn from his strategy.
Dave Grossman carries a “Costanza wallet,” and he says he’s reaped rewards aplenty as a result.