The 8-Player Add-On Pack is an unofficial component and therefore supports an unofficial player count. Please note that it is not accounted for in the official rulebook, nor is there a dedicated compartment for it within the game box.
The 8-Player Add-On Pack contains:
• 2 New Player Colors (including a Miniature, Ship Meeple, and Battle Die)
Cities of Greed in a 8-player mode:
2 players will be without city cards. 1 player will be without a city to start with. Therefore, the 7th player who gets a city, but not city cards, gets one bonus coin to start with. The 8th player without city cards and a city to claim, gets to start with the Mayors' Die and one bonus coin. The 7th and 8th player still gets Influence cards just like the others.
The game is still meant for 6 players, there will however likely be space in the box for the extra components (The custom insert from E-raptor won't have assigned slots for the extra player count), but we won't change the intended player count since we simply haven't tested this but we trust that you guys are right :D
Therefore this is the Unofficial Official add-on player option.