I tried doing a limited google search for any news about that story that occurred since November of last year and got 0 hits. Did the case die or is it that the media just doesn't care enough for there to be a single update to the story?

There's activity on the case (2:17-cv-2313-PMD) as recently as earlier this month, but you'll need a Lexis or PACER account to dig in and see what's up. But it doesn't look dead. Amazon is going to probably bury the plaintiffs in paperwork.

Probably have to check court records to see if it's still open or closed and what happened.