SpaceX spend a few billions on StarLink. But if you look at how much network operators have spent over the years on cables, base stations, etc. it's not all that much for a network that offers high bandwidth access all over the planet.
Adding 100K more satellites is going to make Star Link a direct competitor to many of these operators.
I’m writing this from a small island in a remote country using Starlink, and it’s very popular over here for people that want reliable internet.