alt Hacker NewsI know that Discover has a card with a 5% discount category that changes once a quarter. Everything not in the category gets 1%. It's not hard to get the card (or at least wasn't) and was frequently advertised to college students.
If you combine that with a card that gives 2% on everything than it wouldn't be hard to average over 2% cashback as long as you were mindful about using the discover card for qualifying purchases and the 2% card for everything else.
> as long as you were mindful about using the discover card for qualifying purchases and the 2% card for everything else.
And that's the rub. Credit card companies know most people won't be too mindful most of the time about their spending habits.