I’m afraid that I don’t know Airpoints because my main FF programmes are Qantas, Velocity, KrisFlyer and Asia Miles. But doing the maths on those…
NZ Membership Rewards points will get you one FF point (in Qantas, Velocity, KrisFlyer etc) per 2 AmEx points. So your purchase will net you 134,000 points on those programmes.
You’re paying $3200 for the 134,000 points. That comes to 2.38 cents per point.
In my view, that’s too much to spend on points. It’s marginal, though … if you’re saving up for a flight in a premium cabin, each point can be worth maybe 4-5c.
It’s your call. But I personally don’t think that the CC charge is worth it. Save the money and pay by cash or cheque.
I don’t know Airpoints but my hunch is that the sums would add up much the same way – ie. not worth it. I’m not taking Status Points into account, though, which may make it more worthwhile if they’re of value to you.
Hope this helps!