@2 Rogues, added.
@Captain Coder, Yes I suggest you add a warning for anyone that may see and/or play your game, not just this forum if planning to do so. This is something you need to consider yourself on limiting your viewer base and age, and/or the AUP.
Here's a link for you and others that may be of help
http://www.tigrs.org/
@Bootlicker, refer to above for some info if you need a free rating.
@unfamillia, added.
@Metal Devil123, all the best finding what you need, try a redownload of the media for a license (depending on finding and if still available.) I also didnt add you to the list yet, let me know if you want to be added. Though the list is not a official entrant listing.
@cjkidbravo, added.
@xhogan89x, added.
@ASTEK, good point made above I suggest others to do the same at some point if using others media for other uses above private use.
To answer your question, this is purely up to the developer on what level they wish to take their game to. Someone working on a title from the start of the year planning to make a commercial game and enters the game (not a demo) can do so and ask for judging use only.
However I would more so think a dev making a commercial game as such would enter a demo, which in alot of cases would be made public. There has been BOTB games commercial, not released freeware. However some have then been released for free at a later date.
I am not sure how many of these commercial full games will be entered at the end of the year, or more so if they are released to pay to play as you added, around the same time of the competition ending. The quote highlighted is to let dev's know they can submit anything from a unfinished, unpolished game up to a completed commercial game for a chance at the prizes.
The developers decision to sell their game after the contest end date (or before), is their own choice. The contest or judges do not make that decision for them or direct any advice in not doing or doing so. Thanks for the question.
Good luck to all who enter so far.