Yes, it is absolutely free to signup at Gigity.TV, both for viewers and Artists.
Viewers and Artists get their own profile page through which they can post a picture, become a "fan" of Artists, get notifications on specific shows, integrate with Facebook and Twitter, and much more.
The only cost to a viewer is when they purchase a pay per view ticket through PayPal's security-certified credit-card processing system. Gigity.TV does not hold a ticket-buyer's credit card information.
Please read the Terms of Sale for more information.