Hello, I activated the rating queue on this jam: https://itch.io/jam/alternative-soundtrack-music-jam-5
Yet nobody was affected by the queue, as if it was not activated.
There are the settings: 
There may be a bug when the rating queue unlock size is superior to the number of entries?
Still, on an older jam I tried to leave a blank for the unlock size and it didn't worked either.
Have a good day.