Jim... "There's no way the credit card company could afford to let you use their service for free if nobody paid any interest."

Nope... their cost are wellcovered and the make a profit from the fees they charge to companies... someone said 2% earlier in this thread. 2% may be negotiated by Walmart and the like, but the smaller a business you have, the higher the rates. My buddy was dinged 4.5% when he started out.