Here's the tournament clock & payout list for Event #11 of the $300 O8 event at MGM Grand Las Vegas. Notice it clearly says "$20k GTD (guaranteed)" at the top, meaning that the prize pool must be at least $20k.
However, the screen also clearly says that the prize pool is only $19,700!
Where did the other $300 go? That's a great question!
I tried manually adding up the listed prizes, and indeed they add up to $19,700.
Not a huge scandal, obviously, but that $300 really needs to go back in the pool.
I'll ask MGM for comment via Twitter. Developing...