delphi, in order to get the certificates you are required to book your reservation through the travel company (HMI, Inc.) so they can partially offset the cost through their commission. HMI mails you one certificate for each night that you reserve. Yes, you can combine the $50 certificates but you only get one per hotel night stay. I've been getting discounted certificates through all of those giftcertificates.com and giftpoint.com offers so I use the discounted ones to supplement the $50 ones that come from HMI.