Who are their customers? Do they have private companies hiring them?
However, if Amazon wasn't so up their own ass about not using Spacex rockets, they'd probably be buying almost as many launches to get their project Kuiper constellation up. If they're able to manufacture enough satellites that is.
Which is where the whole "who are their customers" story gets interesting. There aren't any customers of spacex rockets who do as many launches as Starlink does, because the industry hasn't yet caught up to the launch capabilities spacex provides. But they launch for a number of governments, as well as commercial companies.
And not just satellites, but manned missions too! Axiom space has flown non-governmental missions to the ISS, and is planning their own space station. The inspiration 4 mission was a privately-purchased free-flight with only civilians onboard, and was the furthest away any human had been from earth since STS-103 in 1999, at 380 miles.
The world is just starting to catch up to the capabilites offered by modern launch companies!
ETA: I know a simple answer is something like “all residential broadband use” but I assume in practice there are some technical limits that cap the number of customers/bandwidth that can be delivered.
Plus with laser interconnects they can actually beat fiber optic speed for cross-continent or cross-ocean back haul. (speed of light in vaccum, with fewer switches)
There's a lot of use-cases. I bet on them being able to make money long term.
This sounds boring at first - I don't think any consumer really needs that. But high frequency traders will probably pay quite a lot for it.
What it does do, however, is cut latency across the globe... which can be meaningful for any real time communication. Stuff like voice chat or video calls has meaningful latency if you're going across continents. If that's shaved down even marginally it has a meaningful impact on the user experience.
Amazons entire company model is to create businesses that it needs for itself 1st, and then sell the excess capacity.
Why change now by using SpaceX?
That, compounded by the fact that "their" rocket company (blue origin) is well behind schedule, makes it seem a bit foolish. If they weren't Amazon, trying to spend their money on another Bezos business, their absolute refusal to launch even their demo/pathfinder sats on a spacex rocket would look a bit suicidal...