Totally agree with Sei, Shadow, and Chelley.

Another idea is that instead of a perk cap, PG admins can give a monthly perk to the member that contributed the most. It would be just as much as a perk as a reward. Different categories for separate "not-free-perks/ earned awards" could be given to different players too. Like... The person who completed the most PG quests get an EXP Booster for a single thread of choice. A helpful moderator gets a cool new IC item (not overpowered.) Something like that?