I've been a gamer for all of my life, and one of the more impactful things was the development of achievements and trophies for gaming platforms.
It would be great to have these things built into GHL, Agency side as well as sub account level.
Achievement Unlocks for a variety for tasks.
250 Form usages
50 Sub Accounts, 150 sub accounts etc
These would endorse the natural competitive instinct we all have inside of us. It would also increase USER interaction on the sub-account level. Maybe on their Launchpad it showed progression of a variety of things. You could "lock" certain things you are tracking or heading towards.
It seems like every system, game or otherwise has a milestone tracking system and it always enforces usage.