So you buy something for $4000 with a $6000 credit card limit. But only get charged $333 each month - which will slowly start to accrue interest if you don’t pay the $333 off that month. In the meantime, you only have a $2000 balance on your card for other purchases (plus what you have paid off). So the company is holding your credit card balance. Hmmm I’m not sure on this.