Today I got bumped from a VA flight into an Air NZ flight unexpectedly.
I put in my Amigo number and was able to select premium seats for free (they are only $10, but still). But the best benefit is I am in the Air NZ lounge at MEL having breakfast. The ticket agent didn't think I could get into the lounge without a physical card, but they just have an unmanned BP scanner at the lounge and it happily lit up.