How Starlink work in the South Pacific (Tonga and/or Fiji)?

All excellent questions. This situation is still evolving, so any answers here probably have a short half-life, but here goes:

1. IDK myself, but I don’t think Fiji’s online (yet) although there’s supposed to be a ground station near Suva (for Tonga). AFAIK, Fiji hasn’t signed an agreement with Starlink themselves. I would also be interested in response from Tonga, as I think (hope) that Musk DID honor his commitment there.
2. I have been watching for responses, & AFAICT, Starlink has never cut anyone off or enforced the nominal 2-month limit. They’d certainly piss-off all long-distance cruisers if they did. Since they’re in the business of making $$, I’d be very surprised if they turned off the tap on anyone.
3. Never heard of anyone in the South Pacific getting any signal. AFAIK, there’s no ground station except in Hawaii. They’re supposed to be building a station near Manila, but it hasn’t gone online yet. When the sat/sat laser-mesh goes fully active, then distance limitations will go away, but for now (& only in a few locations) you have to be within about 500nm of a ground-station for the system to work reliably. They’ve been testing their mesh, but I’ve only heard of it working in northern Canada, Alaska, parts of Antarctica, the Oz outback. some parts of the Atlantic (just east of the Caribbean), & possibly some of Ukraine.
4. Again, I’ve been looking for this, & I’ve seen none of these limitations being imposed on anyone. While I agree with you that it’s part of their Terms of Service, they don’t seem to be enforcing any of it. Dunno how long this will continue, but it’s certainly not in Starlink’s best interest to enforce this.

So the upshot is that there’s no service today once you leave NZ, & Starlink’s very tight-lipped about the future, so nobody really knows when the South Pacific’s going to turn on.