If you're resident in a country where StarLink is legal (like Mozambique), you can procure the service and then roam in a country where it's illegal like South Africa. I don't think that will ever change.

StarLink's definition of "resident" and "roaming" might change a little bit over time.

StarLink has been quite good in surrounding the countries where they stand to make a lot of money (like South Africa) with "friendly" countries. So, due to roaming, South Africa is losing out on a lot of tax revenue (VAT) and other economic benefits. Speculation is that they will give in.