User blog comment:AYET/2013 Devil Fruits Tournament - Voting Eligibility For The Final Two Rounds/@comment-109.242.16.184-20130729123954/@comment-4374114-20130729141946

I think what Ayet is going for on the 50% is that we don't have a surge of users in these final rounds before the closed, making them fully eligable for the last 2 rounds. Currently there are 10 rounds remaining, so if anyone participated in any of the previous rounds along with the remaining they would be eligable. Any lower than 50%, new users could start now and make themselves eligable going forward.