Crunchyroll Guest Passes : Guest passes are a complimentary service, not a guaranteed part of the premium offering, and are if you would occasionally like to share crunchyroll premium membership with a friend for two days.

I heard that you can get at least 2 days of premium membership for free with a guest pass, since i would rather sample crunchyroll for 2 days instead of 14 days in which i have to use my credit card.