Linux Users Are Unable To Manage Their Apple ID on Applecom (9to5mac.com)
For some reason, Apple's website where you can manage your Apple ID (appleid.apple.com) is blocking users of Linux browsers from accessing it. From a report: Having access to the website is important to manage things such as payment information, two-factor authentication, and other account details. Even though the number of Linux users accessing the website must be relatively small compared to other operating systems, some iPhone users who use Linux on the desktop noticed the issue. This behavior was first explained by user Alexander Martin on Mastodon. He discovered that when the browser reports itself as being a Linux browser, Apple's website will block the access by throwing a "Bad Gateway" error.
...if you don't have $$$ then they do not want you.
Yeah.. I suspect some horrible mess of nested if-then-else clauses with some fall throughs or cases with errors in them.