Does anyone have a link to the full terms and conditions? I can't seem to find it on their site.
You can interpret their offer several ways. Some possible interpretations are:
a) Once the 15 minutes start, every hotel is displayed at $1.00 and you can book up to 7 nights.
b) We give you hints and you book your hotel rooms. Afterward, we tell you if you booked it during the 15 minutes and lower your rate to $1.00.