This new guild cap is being enforced for several reasons, but they all factor into a need to control guild sizes in light of the new guild systems, including guild leveling and achievements. Previously, adding players to a guild was as simple as adding people to a chat channel. While approximately 500 members were visible in the UI, there was no real need to limit guild size. That is no longer the case. Guild leveling in Cataclysm features unified progression powered by a series of complex systems that track the contributions of all guild members. The larger the guild, the bigger the impact on these systems. We found it necessary to determine a maximum guild size to ensure continued performance now and into the future.