SpaceX is the only major operator of spaceflights in the US: more than 95% of all satellites launched are launched by SpaceX, not just in the US, but worldwide.
Another way to look at this number is that they are responsible for 95% of the light pollution caused by orbiting objects.
Not that I don't think it's cool to have a web of spacecraft enveloping the planet and bringing high-speed communications to everyone everywhere - it's pretty impressive to point up and show a train of satellites to a kid - but astronomers have been complaining about them and they are right.