Explain It to Me Make credit cards work for you
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Feb 22, 2026 
Sarah Rathner, credit card expert at NerdWallet, breaks down rewards and simple strategies. Sean Venata, financial historian and author, traces how cards and interest rates evolved. Angel Sevilla shares a first-person story of racking up and repairing major credit card debt to qualify for a home. They talk rewards basics, debt recovery steps, history of high rates, and practical card-use tactics.
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Early Card Led To Spiraling Debt
- Angel Sevilla got a $1,500 card at 18 and quickly used it for daily purchases and gifts thinking he'd pay it off later.
- He kept paying minimums, called for a credit limit increase, and pushed his balance to about $3,500 by age 20.
Credit Repair Through Secured Card
- Angel discovered his score was 490 when denied an apartment and moved in with a boyfriend because he couldn't qualify alone.
- He repaired credit by paying small collections, using a secured card, and slowly raising his score into the 560s then higher.
How Lawlet Banks Export High Rates
- The Supreme Court ruling let banks apply their home state's rate nationwide, so banks moved to states with lax caps.
- That legal shift (and relocations to South Dakota and Delaware) enabled much higher and changeable credit-card rates.