YMMV, but some people have had success getting 20% credit refunds from Amazon.
I just contacted amazon support to try my luck with this. As soon as I said the words "class action lawsuit" I was immediately transferred to a supervisor specialist department and he quickly shot me down. He looked up the class action lawsuit and said that since the lawsuit was against Nvidia and not Amazon I would need to contact them directly. I thought it was probably too good to be true since the class action suit said we get $30 while 20% of my $330 purchase price would be $66.
I haven't gone to the effort of seeing exactly what is necessary to get the settlement directly from Nvidia yet. Since I technically have receipts for 2 970s even though I only paid for one of them it might be possible to get $60 if they give me credit for both cards. If they require serial numbers I won't be able to get credit for anything since I sold both cards though.
Either way, I can't complain too much since I used these 970s for a year and a half and then sold them for more than I paid. Selling the 2 of them to buy a 1070 while still making putting $50 cash in my pocket (after selling and shipping costs) is pretty tough to beat.
