Maybe they are sick of surveillance capitalism and don't wish to be part of it?
I'd do the same, but I really don't want a flip phone. Maybe once Pine Phone with GNU/Linux is working reasonably well, I'll switch to that.
I bought a locally made KaiOS phone but it has too low RAM and keep crashing.
Nokia makes flip phones with KaiOS but they aren't allowed in my country sadly.
Reason is I want a phone I can repair myself, all my previous phones I had to replace because some unrepairable part that didn't need to be unrepairable (one of them it was the battery!) broke down.
Instead of shelling a ton of money to be tracked and buy a product that won't last, I wish I could spend my phone on something that will last.
And the flip cover is convenient for me because I keep forgetting to lock my phone and managed to pocket dial even with an android.