IHG lets me login, it lets me choose a hotel and a room using my free night certificate, but when it should show me the page where I enter credit card information, it takes me back to the login page. If I was in the business of getting people to give me money on a web site, I would make it easy for people to give me money at my web site--and making it easy for people to redeem offers that I gave them would be part of the cost of doing business.