Also, should have asked this first, how exactly does this work.
Please read the first few posts in this topic. On a completely different note, I don't normally do this, but this doesn't normally happen, so I think it's noteworthy. Twitch is currently giving out GOG keys for Ghostrunner in Prime Gaming loot. They expire on November 7. If you have Amazon Prime, you can link your Amazon account to your Twitch account and claim the game here. If you don't already have the game on GOG, check it out. It's a really good one. If you do already have it or it doesn't look like your cup of tea, any and all donations would be greatly appreciated. No pressure, though. :)
It's also worth mentioning that you can claim all of the current Prime Gaming loot if you use the 30 day free Amazon Prime trial, and if you live in the United States and receive food stamps and/or Medicaid, Amazon Prime is $5.99/month. You can sign up here.
People who redeemed the Amazon Prime Ghostrunner gift, like me, seem to be receiving now a newsletter from GOG, thanking them and offering a free key to Ghostrunner Katana DLC (exclusive item, not available for sale), so if anyone here wants the DLC too, they should probably enable the newsletter option ASAP.
I don't know if the same goes for people who bought the game rather than got it from Amazon.