Which side was this 2M bet on at MGM for SB LIII?

[DJK]

Just saw this tweet.

Yet, MGM line didn't budge an inch. So, what does it mean?


I have no further details to report at this time, but per @Jay_Rood, @MGMRaceSports has taken a $2 million bet on #SuperBowl @VSiNLive