The three races and the weak story being the two reasons for its success is bollocks. The only reason SC got where it is today is because of Battlenet. It was the only RTS game at the time that offered both a practically easy way to play online and a community in which to find people to play against. C&C: Red Alert for example had a terrible old-style connection-page for its multi-player part which turned a lot of people of from ever trying to play it online. The real success is Battlenet, not SC.