If your score happens to be in the top 5% of all AIM users online, we'll show you where you rank in comparison to the others in the top 5%.
If you don't see your rank, it means you're not in the top 5%. Remember, not ranking doesn't mean you're a bad person. It just means that people who have you listed as a buddy might not be online.
So apparently it's all based on who has added you to their buddy list, and is online at the moment. The score sounds like it should change quite often.
From the "What is AIM Fight?" page: So apparently it's all based on who has added you to their buddy list, and is online at the moment. The score sounds like it should change quite often.