That's a good question. I was in the GDevelop examples jam and afterwards I looked at how the end result scoring worked. They calculate the median (roughly the average) number of votes for all games. So for this jam if that number is 20 votes, then games who get fewer votes than that will have their score adjusted down. So if only 5 people voted for a game, but all of them gave it 5 stars, its score would go down. The end score for games with 20 or more votes would stay the same.
So, I was just trying to set a motivation for people to vote so that it makes it fairer for everyone. But I forgot to explain about how the scoring works, so thank you for your question.