The drawback is the top100 site is... very unreliable and poorly designed. They've finally updated their postback system to allow custom parameters so we're testing it to make sure it wont provide more frustration than benefit. In the past we've found that the majority of votes were incorrectly ignored causing lots of player frustration. Sadly there's still a large group of people who rely on sites like that to find our game so it's a necessary evil.