The only problem I've had is that my order was not given the 20% off for my preorder. I'm guessing it was because I ordered it before the discount was applied to the game. I just figured it would have been automatically fixed on their end. I guess not. Oh well... the $30 asking price is more than fair.
If you go to the product page now, they aren't even showing the 20% off for Prime members anymore. They only retroactively apply price updates if it decreases for everyone.
And yeah, it looks like I'm paying full price too, even though I could've sworn I went in and updated it after they activated the prime discount to get the lower rate. Same for Yakuza Kiwami 2 for a week later, that still shows prime discount on the site but not my order. I don't really want to cancel my order and recreate it just to get the $10 discount on that.
Edit: The prime discount terms have changed:
Offer does not apply to certain video game products such as toys to life, collector’s editions,
re-releases, re-masters, and product bundles including but not limited to console game bundles and accessory bundles.
https://www.cnet.com/news/did-amazon-just-nix-its-20-percent-prime-discount-for-remastered-games/
Also, lucky you. My day 1 Amazon pre-order has not yet shipped. They are weird sometimes when it comes to pre-orders. For example, I pre-ordered Mario Odyssey on Switch from Amazon over a month before release. My copy did not ship until the day before release and arrived on release day. My sister, who lives 45 minutes away but is still in the same delivery region (and closer to the nearest Amazon fulfillment center) pre-ordered the exact same game 3 days before release, it shipped the next day and she got it a day before release. To rub it in some more, she got the quick delivery because of me. I've been a prime member for about 10 years now, and joined back when it was just free 2-day shipping before Prime Music and Video were other perks of the service. Back then you could share the service with up to 5 family members, even if you didn't live at the same address. They removed that several years ago and now family sharing is only for families at the same address, but my sister and my parents are still grandfathered into the old sharing so they still have free 2-day shipping via me still having an active prime subscription. (They don't have access to the other benefits that didn't exist then though)