Adonomics offers statistics for Facebook plugins so you can see which developers have the most installs. They give you emebedable code so you can track, for example, daily active users of an individual plugin like FunWall:
Adonomics also provides a valuation for plugins and a space for developers to try to sell plugins. To developers they offer services like:
Adonomics helps Facebook developers and owners take their applications through the three key phases of Growth, Engagement, and Monetization (GEM). Whether you’re interested in
1. Growing your app by designing it to spread virally
2. Engaging your app’s user base activating key users
3. Monetizing your app by running third-party ads, signing up sponsors, or selling it outrightAdonomics is your best source for information on what works (and what doesn’t). We’re dedicated to sharing the best practices and helping you get the most out of the Facebook platform.
Thanks to Shawn for this.