How to promote more participation in PL?

I was reviewing my profile stats and came up with an idea to promote more participation in the league, that should not require much programming. What if there was an achievement for PL games joined and a statistics line for PL in the Profile. After all a win or coalition victory here is a lot harder than achieving one on a regular game map. If nothing else this would draw in those players who are achievement driven.

I also thought it might be a good idea to create a separate thread for "how to promote PL" as I keep finding little tidbits of discussion in various PL threads but nothing in one central location.

Anyone else have ideas?