As a supporter (and one who is a Koby Stevens fan) yes, definitely get him signed up.

From a list management perspective, certainly sign him up - but I don't think there is a huge urgency there or a need to commit for a 3 or 4 year term. Koby is already at his second club - he would be picked up elsewhere, but isn't going to be poached. I don't think he is one to be concerned about. You would think that the club and Koby will have no problems reaching a 2 year deal at some point during the year.