Yes. But they pay in full every month.

Yes because there’s an advantage of using it and rich always leverage from debt

Exclusively, why would I use my own money when I can use the bank's interest free for 2-3 weeks.

No, they get someone else to pay for things

Of course

why use a debit card when u can be earning on every purchase with zero liability

Yes!!

Of course they do

Yes, they use cards with good point systems to capitalize on the rewards.

Largest purchase ever made on AmEX Business Centurion Card was reportedly a $170 million painting, bought by Chinese billionaire Liu Yiqian Liu. The purchase wasn't the first massive art purchase Liu made with the card. He previously purchased a $36 million antique tea cup - Ming Dynasty. The Card only earns one Rewards point per $1 on standard purchases and 1.5 points per $1 for purchases over $5,000, this means that the art purchase alone earned Liu about $2.6 million in redemption value