Why is SpaceX's rocket business considered cool but not highly profitable? The real money-maker is Starlink. Now with over 10 million subscribers, last year's revenue surpassed $10 billion, and this year it is expected to reach $24 billion. There are few companies worldwide capable of providing satellite internet, and Starlink has captured the vast majority of the market. Rockets are responsible for launching satellites, while Starlink handles the monthly billing.