Today's the day.

The idea may be to force ppl to interact with each other via minigames, whereas the other methods give no gurantees of that. Seeing that you have some ppl that don't boss and like to sit around and socialize, it makes sense.

There are far better ways to do it.

Make the best way to get mileage from mini games, half or quarter the mileage gained from bosses and whatever else. Everyone wins.