Some very rough math. $16 billion in EBITDA with 9million customers. This translates to about $1800 average annual subscription. Per month this is $150.

Starlink for Land 500GB subscription is $165 per month. https://starlink.com/business/maritime.

That is I think Starlink's target customers are ISP deprived. I asked Gemini estimate the size of that market. It said about 10 million in the US and over a 1 billion worldwide. I assume the Elon is pushing the 1 billion number. The problem I see is that outside the US, not everyone can pay $165 per month for internet.