the gta 4 multiplayer is based on the same thing. more players=more points. and for the record, there's no rules, you can beat it with one or 15 players.
because of there is only 20 races ( + boat & copter & point races = 35), it's really hard to beat an international record.
but i understand it's a bit annoying to have no points or records because of the rules of 10 players. Especially if there are less of 10 ppl in the majority.