I personally like to rotate them based on rewards intro offers (can't do this too often of course because it does leave a temp mark on your credit score, but on the flip side once that hit falls off -- assuming you manage your debts properly and do not retain revolving credit card balances -- that means your credit may actually increase because of a higher combined total credit limit).
I made $238 so far just from buying Christmas presents this year ($200 intro rewards + $38 on those sames purchases as regular rewards). I paid $0 interest because I zeroed out the balance as soon as the charges processed. Just knowledge sharing in case it may help anyone else

When it's not the right period of time for a new introductory card, my "daily driver" is a WF card with very good cash rewards. That usually nets me roughly $30 a month (hey it's not much but it's free money just for buying everything I would have needed to had I used cash and then I get 1-2 week's worth of Free gas a month).
If you can be disciplined enough to only spend on the card what you can afford to pay
cash at that very moment, you can profit regularly because then no interest can be charged because you'll pay it off instantly (and regularly maintain a high credit score).
*This is simply my personal experiences following the strict and rigid method explained above. There is no room for error in this "game" and credit cards can cause financial ruin in the wrong hands. None of this should be considered a replacement for professional money management advice.This post was edited by CyrusTheGreat on Nov 17 2025 06:50pm