I managed to get one from Target this morning so I cancelled my Gamestop bundle. As far as Jake's stream, I did find a couple pieces of information helpful. The bit about Paypal is interesting even though I didn't use it. For me, it was more just spamming the checkout button. It took me 18-20 minutes before I managed to get my order through. I would have given up because it's not how ordering things online usually works.
I get the frustration because it's really about luck and not having normal expectations for how to buy things online. I tried this week at Gamestop right when they dropped the bundles with no luck. It kept saying to check again in a few minutes. 30 minutes later, it worked perfectly. At Target, 90% of the time I was getting unable to checkout error, 10% an unknown error occurred, and once it prompted me to sign in again.
Good luck to those still trying.