https://www.gamespot.com/articles/create-your-own-game-deals-today-at-rakuten-ps4-xb/1100-6460473/

Most of today's retail attention is aimed at Amazon Prime Day. But even though the online mega-retailer has cut prices on many items across nearly all categories, not everything is on sale. In an effort to share some of the spotlight, the retailer Rakuten is cutting 20% off prices on everything on its site--provided you enter the promo code SAVE20 at checkout. That means you don't need to wait around hoping Amazon does a Lightning Deal on the item you want. You can just buy it from Rakuten.

But as with all good things in life, this deal has some drawbacks. Like Prime Day, the promo code is only good until tonight at 12 AM PT / 3 AM ET. The maximum discount you can get is $50, and the deal will end early if "promotional funding is exhausted." That's from the fine print. What's not in the fine print is that a number of items on the site have seen their prices cranked up higher than normal, meaning you won't actually get 20% off the MSRP for everything.