EVE Online is offering veteran players a chance to entice friends to join the community through a program called "Wingman":
Active EVE Online subscribers can uplink a burst transmission to would-be comrades. Enlist their help and better your chances of survival in deep space. Through the Wingman program, send your friend a special no-hassle, no-fuss, no-credit-card-needed offer for 14 free days of EVE Online.
Check it out at the link above.