Can you still comment and vote after the closing deadline? Maybe then the most popular pictures will move up a bit and not be pushed away by new entries.
By the way, I do not know anyone who participates in this competition and my friends are not registered so they cannot vote, BUT, I have regularly looked at the entries and commented/voted on pictures that 'did' something for me. A lot of people, but by no means all, have 'returned the favour' and looked at my photographs. In this way I have collected quite a few comments and votes and got to 'know' some of the other photographers.
I can recommend this 'strategy' to everyone.
(I am by no means a 'real' photographer, just a housewife who is trying to teach herself digital photography.)