Hotel companies have a tortured relationship with online travel booking sites. They rely on the sites to bring travelers to their properties and fill rooms. But companies like Expedia and Priceline charge commissions of 15 percent or higher. The hotel chains would rather keep that money themselves. "It costs them less and it gives them a better chance to create a business relationship," said Henry Harteveldt, of travel consultancy Atmosphere Research Group. "They get our email information and a chance to win our ongoing preference." Harteveldt noted that fewer than one in four hotel guests belong to a loyalty program. Expedia said online travel agencies help travelers discover new hotels and offer efficiency. "The vast majority of travelers coming through our sites are new, brand-agnostic and incremental to the chain's existing loyal customers," said Cyril Ranque, president of lodging partner services for the Expedia Group. "To ask a consumer to search multiple sites for the best price sets the industry back 20 years." Get the full story at CBS Money Watch