Hi Hollis, Compendium sharing is on a per-game basis, not a per-player basis. With a Pro subscription each game is allowed to have 15 players (Free is 5, Plus is 10). If you run out of games you can turn off sharing on one game, freeing up the slot, then turn it on with a different game. Effectively, by swapping which games you are sharing your compendium with you can have unlimited games...just not at one time. Example: A GM with a free account is compendium sharing with "Game A" on Friday. On Saturday they turn off Game A's sharing and share with "Game B", the Saturday game. On Sunday they turn off Game B's sharing and share with "Game C", the Sunday game. On Friday they go back to Game A.