Have you tried a different browser? Or device? I can see mine on Safari but not Chrome. Regardless of what’s visible on a particular browser, I’m guessing that the Amex ticketing system will have the data needed to determine your eligibility.
No disrespect for others but I’m sort of hoping this is the case. Part of my getting an ST this season was a conversation with my wife in which I promised her more than one European breaks over the season!
It’s unpredictable. We struggled to sell FA Cup tickets for Liverpool, even at £25 each. It sold out in the end but I had several nagging emails reminding me I could buy 4 tickets. If we’re playing one of the bigger teams, we may sell out but a few obscure clubs make it through to the group...