This reminder is a bit late, but I wanted everyone to know that you have just over four hours to submit your entries for this round. Good luck to everyone!
An entrant voting for themselves is inherently biased. Even if you happen to be someone who will honestly vote based on which you think is the best (whether it is your entry or not), there is no guarantee that everyone will be like that. Plus, it's unfair to entrants who want to be modest and give their competitor a chance. Like Ayn Stein said, it basically forces an entrant to vote for themselves if their competitor does as well if they want to win.
I also don't think it's restricting the "true opinion" of the entrants. If you truly believe your entry is better, feel free to say so in the thread. However, preventing entrants from voting is for the same reason that we have the rule about having your friends unfairly vote for you. Just because it's not serious doesn't mean we don't want to give everyone a fair chance.