The one time paid license is available if you’re willing to jump through hoops and contact support with the right incantations that they will understand. For mere mortals, it’s as good as non-existent because the AgileBits website and its support team go to great lengths to not reveal that there is such an option.
The standalone license hasn't been on the homepage as an option ever since the subscriptions started (and it still isn't there). If you go to the support home from the homepage and search for "standalone license" (or "standalone"), there are no results. So unless you happen to know that this option is available and spend time finding out how to get it, it's impossible to know. It is a dark pattern in the name of "not confusing users".
Just installed a fresh copy of 1Password for Mac. You’re right that it’s hidden and a dark pattern, but your previous comment on how to get it was wrong. When you launch the app, there’s a big “start my trial” button. You can make a vault, and then when you try to modify it 1Password will ask you to subscribe or purchase a license.
Also there are definitely results when you search for “standalone” in the support section, including the link I had in my comment.
