3 strikes you're out

An anonymous student created an Instagram account to post the progress of every chosen player in their (possibly) deadly game.

Once you're chosen, you must play.

2 simple rules:
Don't play = 1 strike
Cheat = 1 strike

3 strikes and you're out. No one really knows what happens when you're out. Only that you disappear. Many assume that you die. Well, that's what the police think when they're not found.

It's been almost 2 years since someone has been chosen to play. Three 14 year old students get picked. It doesn't take long for the whole school to find out. Practically everyone follows the account.

Don't play (maybe) die.
Play (maybe) survive.

Who made the game?
Why was no one chosen for so long?
What happens when you lose?
Will they make it out alive?