Thank you Michael_V on Flyertalk for pointing this out!
Hot Wire is having a promotion until March 2, 2015 (though these types of deals usually end early), where they’re automatically discounting $38CAD off a 4-star reservation or higher, including tax. There are no minimums, that is, you can book single nights to maximize the discount. This discount only applies to their “Hot Rates,” which are opaque booking. This means that you do not know the exact hotel you’re getting prior to booking. However, with a little bit of digging, it’s not too hard to figure out what hotel you’d be staying at.
This promotion can be excellent for cheaper places, where you can technically bring the hotel price down to $0.