Basically anyone who doesn't have a motivation to twist the truth? Like the US government who can actually provide hard proof that they paid for the hardware? Why would we believe Elon in this case?
https://www.euronews.com/next/2022/02/27/elon-musk-deploys-s...
All I'm saying is that his tweet is not a reliable source for that number. We'd need another, more reliable source to confirm.