Just be aware that several hotel chains now give free internet only to those who book through the hotel program's own website, not through third-party sites like hotels.com. (They may also require membership in the hotel program, but it doesn't cost anything to become a member.)
Of course, each of these hotel programs have some brands that give free internet to everyone. So what I just said only applies to those other brands within these same program that don't automatically give free internet to everyone.
And depending on the room rate, at some hotels the cost of internet might be more than the 10% you (eventually) save with hotels.com!