Look at it this way. There could still be an overall high-score leaderboard. This could simply be a filter applied to that leaderboard. On most leaderboards, I could really care less about who anyone is, as I have no clue who they are, and only care about where I stand in it. But if I could apply this filter to the leaderboard where I would then be able to recognize almost everyone, then I would find it much more interesting to scan. Additional filters could be applied on top of this, such as movie stars, athletes, or like Compete.com, have the ability to compare specific celebrities, on individual games, or on multiple games.