Hm, given that I was a judge last year also and there wasn't a community vote, I made a 4k game but was unable to submit it. Now that there is a community vote, would I be allowed to submit a game I made last year but was not actually part of last year's competition?
That is surely something I've been thinking about.
I don't think there is any conflict of interest. The community voting is something that the judges cannot influence.
If people are positive towards this, then I see nothing wrong with judges submitting games just for community voting.