Im just thinking after reaching at 10th position, they could just go afk, quit, and all-in because there is no point continuing.
(The tournament will end when only 10 layers are left. Total time expected for this event is below 1 hr.)
Here's the game rule, I don't think they'll do what you've just said since it will end if there are 10 players left in the table. It pays to read ser.