With achievements and stuff. Stuff like winning circuit matches and alike could also count towards this. Ofc also general record stuff. But not related to your actual "score" @ toplist :)
Just random notes..
Achievement stuff like made a post, sent a pm, received a pm, set a record, set XX records, got into top 1000, top 100, set a record with a different strafestyle, set a reversed record/any runtype, got a top 100 record, got a top10 record, got a top3 record, got a #1, was mentioned in a post.. out of laptop battery bb