Dropped Games when clusters joined to game data

[Spencer-Weston]

When game data is joined to cluster data, we lose some games. Clearly, there's a mismatch in game_id's between the two datasets. Will need more investigation into the cause of this.

[weijialimtl]

there was 2004 game data in the original game dataset to compute the historical game stats for each game. Those will be excluded in the join