Didn’t work at all with Air NZ for me.
They had promotion on flights on their aussie website, but you can’t spend airpoints on aussie site. Same flight on NZ website was nearly 2x.
Didn’t work with Wizzair when they changed my flight time, notified I don’t need to do anything and then charged 30€ for check in.
Didn’t work with Air India - they don’t even have Twitter (just wanted to change my flight date and you can just imagine how bad their call center is).