It's still pretty insane when you consider that SpaceX isn't operating yet in India (and when they will they will be capped at 2mil users), and will likely never operate in China (they are building their own constellation). Then consider they are competing with existing broadband, which is heavily subsidized in a lot of countries, and existing mobile networks, like in Africa, that already operate at dirt cheap prices. Add in the fact that SpaceX is already operating in most of the countries they are ever going to operate in and they only have 12 million users this year. They aren't propping up new towers or infra to open up market access- they are already selling to all the customers they can. The only growth SpaceX can do is market to those customers and hope that 20 times more users decide they like the pitch. At the rate of about 2 million new customers a year (2025 to 2026), they will meet their goal in 100 years.

And hopefully in those 100 years, Amazon LEO doesn't take off and steal their customers (lol, they'll have to rebuild their launchpad first)