This is not “action camera day”, it just happens there are sales everywhere of them 🙂 BuyDig through the Rakuten website is offering the new condition GoPro HERO4 CHDHX-401 for $276 with free shipping until 7/16/17 or earlier if sold out. The price is automatically discounted while this promotion is running.
You can use promo code REWARDME to get 5% in Rakuten Reward points. This does not change the price you pay. It only earns you Rakuten Rewards which you can use in future purchases.