Yes, I believe there are ICO's having a very long campaign period mainly because of limited time, ICO cannot met the target token sale within the given timeline. In the bounty hunter's side, I believe that a bounty hunter should extend his patience in situation like this where some have extended for almost ten months having 2 phase of the campaign period. In my opinion, no matter how long will it take for as long as you will be paid right after the campaign, that's fine with me.