Well kids are using VPN’s to get around local laws about age restrictions.
There’s nothing Brazil can do about this outside banning VPN’s (which of course leftists want to do).
But Elon cannot get ad revenue from Brazil.
Banning VPN’s is not as easy as you think. China has tried it and failed....for years. The Great Firewall of China has been bypassed by plenty of tech savvy Chinese via VPNs.