Update: August reward is now available, and sadly this time it’s 3 more Standard packs. It’s not the worst reward ever, but a random Legendary is clearly a better option. It’s also the last Prime Gaming reward after many months of freebies. Maybe more will come in the future – if they do, we’ll let you know!
Blizzard is partnering with Amazon’s Prime Gaming in the coming months. We’ll get “free” in-game content for multiple Blizzard titles including Hearthstone. “Free” because you need to pay for Amazon Prime sub, but many people do it anyway for other benefits like Twitch Prime or their streaming service. It certainly won’t be worth doing it just for the Hearthstone freebies, but it’s a nice bonus if you play the game.
For Hearthstone, we’ll get four random Legendary Cards + multiple Standard card packs. However, the items will be spread over multiple months. The offer is ending on September 14, so I would assume that we’ll get a new item every ~25 days or so.
Technically you could claim your free month of Prime trial, but you won’t be able to pick all of the items since – as I’ve already said – they will be spread over multiple months. If you time it right, you might be able to pick up a few of them, but I’m not sure if it’s worth the hassle.
In-game content for other Blizzard titles including Overwatch, WoW, and Starcraft: Remastered will also be available.