Can you suggest a few ways to make money with credit cards?

You can use your credit cards strategically to generate some cash for your payments.

To make money using credit cards, you may try to obtain a card that pays you to shop. This card is called cash-back credit card.

This is the way you can make money by using your credit card.

You can also use a Rewards credit card to use the acquired points for other purposes.
However, make sure you know the terms and conditions before suing such a card.

I would just like to add one point. Some credit cards give sign-up bonus. So, you can use it to shop online. Other than this, you can use a balance transfer card to pay off your high-interest debts, That may help you to save money on your debts.