Imagine your whole country’s Internet going dark. Kudos to the private ISP owners in Tonga who financed and organized a solution while the fiber is repaired.
Bali is another island in a similar situation, at 100% electrical and Internet capacity (excluding the private Biznet Fiber link from Jakarta) for over a decade. Restrictive proxying and timeouts are used to control bandwidth usage, along with “USB drive sneaker net”, similar to Cuba.
When there’s a fiber cut, you just spend the week or two at the beach until it’s fixed. 🙂