The article says "The airline has refunded flights to or through the US and anywhere else it will not fly again, like Buenos Aires, but has refused to refund the cost of other tickets, offering credits instead".
I don't think that's entirely accurate. I made multiple phone calls and sent multiple emails trying to get a full refund for our flights to Buenos Aires that they'd cancelled. They were absolutely insistent that my wife & I had to cancel our tickets and so pay the ticket cancellation fee of $300 AUD each. We were always entitled to do this under the conditions of carriage if we'd wanted to cancel for any reason, but I don't accept that we were truly the party cancelling here.