Just like Orbitz was launched by the major airlines as their own comptitive response to online travel agency sites like Expedia, several hotel chains got together to start an online booking site of their own.
Room Key is a metasearch site that displays hotel rates for their founding hotel chains and commercial partners. When you select a hotel, you’re directed to the hotel’s website to complete the booking. As a result you still earn points and status credit for your stay and you don’t get treated as an online travel agency customer.