During competitions, under members participated, why do some members have a 0 for their total score?

Why would they want to do that? Do they get the prize if they have a score of zero?

Yes they do :(

You have to play a scene to score

As previously stated they “ripped their ticket” to get into the competition then played only one scene. They do this so they only expend 11 energy points but still get credit for playing the game, and get whatever prizes are earned by their teammates by doing basically nothing.

I think it takes at least 5 rounds to earn 20 ribbons in these competitions which is 55 energy points. Most people play as many rounds as their energy level will allow because it’s a fast way to earn a lot of ribbons for the Detective League competitions.