Sometimes, the player that creates the game (for our purposes, a private game) messes up and creates a game with undesired settings.
Scenario: Players join private game, and all's fine. But then they realize it's sequential, (they didn't pay much attention since they thought their friend made it correctly), so now the game is going to take much longer to complete.
And the players will refresh more often to keep the game going faster, causing undue stress to the server in contrast to freestyle.
So the solution, would be to let the players vote to close the game. If 100% of the players vote to close the game, the game is over and nobody loses any points.