[michaelt]

Other people have mentioned the legal/sanctions reasons.

But also, from a business point of view, maximum profit might mean offering a $100 a month service for residential users, a $1000 a month service for billionaires' yachts, a $5000 a month service for private jets, and a $100,000 a month service for defence industry applications.

Charging more for use away from home, based on GPS data, could be very profitable. Especially as you need GPS tracking to beam the signals to the right place anyway.

[jvanderbot]

I am fairly certain the backbone customer for starlink is or will be militaries, not necessarily private jets.