Source: https://venturebeat.com/2018/12/28/netflix-permanently-pulls…
It was trialed back in mid year and it's now here to stay. Personally I just resubbed last month using iTunes billing after several failed attempts of subscribing via Argentina/Turkey. Had I not made it in time I'd have ~$300 iTunes credit sitting there which I acquired through various iTunes GC deal over the years solely for Netflix (I do own iOS devices but I hardly buy any apps)
Looks like I can ignore all future iTunes GC deals from now on.
I pay my tax debt with iTunes cards. Didn't know about Netflix though.