I'm gonna wait for Steam version
Free work is ok if it's not-commercical project, such as modding for game. If it's commercical and they're going to make money off your work then it's unfair.
Rainbow Six Siege Trailer (Powered by NVIDIA GameWorks)
This is a trailer for the PC version of Rainbow Six Siege video game that features NVIDIA GameWorks Technologies. Gamers can get a copy of the project for free if they by one of the qualifying graphics cards. Information on the recommended GeForce GTX GPUs for Rainbow Six Siege can be found on GeForce.com.
© NVIDIA, 2015 YouTube Link