Membership is open to the greater Cornell community. This includes current and former students, staff, faculty, friends, and family. There are semantic administrative "levels" of membership (see the club constitution for more on this) but, aside from officerdom, they have no actual effect beyond satisfying the Cornell bureaucracy.
One of the benefits of having no expenses is that we have no need of income. Membership is free!
At the moment, a warm and fuzzy feeling inside. You may also get 10% off games at local game stores.
Believe with conviction that you are a member, and it will become true. Also, sign up for the mailing list.