I am well aware of the Norfolk Island tourist traffic, but how attractive will a once-per-week air service be to the tourist market?
Time will tell and I imagine the operator will react to market needs. Pretty basic business principle, really.
There will be some happy campers if the sole aircraft goes US!
You're out of touch, Nauru Airlines has 3, possibly 4, passenger aircraft and the ability to mount a quick rescue should it be required.
IIRC Our Airline (as Nauru Airlines was known at the time) some time back (early 2012?) ceased the service that Norfolk Air had leased it for. The Our Airline service was not subsidised as such but funded by the Norfolk Island Administration (NIA) until the NIA decided to withdraw from any airline involvement. The Australian government, in its wisdom, offered a subsidy to operate SYD-NLK and they have been paying that subsidy to Air New Zealand since. Had they paid that subsidy to the NIA then the Norfolk Air service may well have continued without the loss of dozens of local jobs that it provided.