From what I read about the whole thing back when I was sort of interested, all the satellites have to be inserted into a VERY low earth orbit to be operable. So, barring numbers, they’ll be falling through the sky constantly simply because the design is short-lived by its very nature. Makes sense why Elon would be into it so much. If he can get governments to invest in it, it would be a constant revenue stream. A money pit, if you will.