Maybe they never had any plans and this was just a way to drive traffic to their site for the 3-day sale. What a way to waste a large number of people’s time by being ambiguous about the timing “sometime after 8am CST”!
It's ridiculous. They said "after 9am EST" but gave no real time. I have been trying since 8:30am EST and have had no luck. The website and app were working just fine before 9am EST, then BAM, it crashed. I was never able to get anything other than "Coming Soon" so if it was up and sold out, it sold out in less than a minute. This is almost as bad as the re-selling occurring at 2 or 3xs the price. Build everyone's hopes up then don't live up.
When you click on the Inventory link for Microsoft - Xbox Series S from the TG article, it'll take you to the xbox page. Click on "check availability" at the top. The xbox page will load - and you'll see "Select a Retailer". HOWEVER, if you keep refreshing this page, a "Buy it Now" button will pop up. Hurry up and click it, then go from there. Even when I got in, the page said "Out of Stock", but I just kept refreshing every page I came to and then it finally let me add to cart and checkout. Also, Walmart is selling them at 3pm online. I would suggest keeping both sites open and toggling between them. Hope that helps. Good Luck!