It's been a looooong time since I've had this issue, but I distinctly remember the "get" being grayed out (for example, gps-dependent apps on a non gps-enabled iPad). Has this regressed?
Yes. It's regressed. This video [0] is an example of what happens, EXCEPT on mine the pause was considerably longer before the "unable to purchase" pop up came up.
[0]: https://youtu.be/lMMrU732w6Q?t=82 (and if you look at the comments, you can see that I'm not the only consumer frustrated by this issue)