I don’t have an exact number in front of me, but I imagine that we receive at least $8k back annually in rewards from our various cards.
The only thing that doesn’t go on a card is the electric bill because they didn’t allow it until recently. But I believe they now do so my wife will change it soon.
In addition to the free money, it’s also safer. I would never use a debit card.
Nobody got wealthy by using credit cards. The “free money” is a cheap psychological trick. I don’t have the hubris to think I’m better at resisting unnecessary spending than the marketing department at Visa who wants every extra dollar in my wallet.
What many people find, after falling into the “but I fully pay my card each month” trap, is that turning off the card after this point is difficult with their current income, because they have effectively pushed their real wages a full month into the future. Depending how heavily you’re into credit it can take several months to build up a cushion to avoid dipping into emergency funds to cut the cards for good.
It's just not my thing.