You should probably read https://www.steamgifts.com/about/guidelines
This is like beta key or guest pass, I don't think you can give away a game that will expire in a month.

Steelseries / Alienware keys will be revoked July 31th, please don't give away that key if you got it there, it would cause you and the person who win problems at some point as you could be accused to not have given the key and they can be accused to not have claimed the key.