It makes no sense... 😂 as this is officially called a digital nomad visa. Would them ask, if you're a digital nomad, why are you traveling? I applied for my DTV with a document issued by my employer in which they assure that -on their side- I'm allowed to work remotely from any country in the world.
I've entered 5-6 times already, since October (when I got it). The last time was a couple of weeks ago. I've never ever been asked a thing, just greeted and stamped.
Participante anónimo 800 Nobody said it's not possible, but it's very unlikely, at least on my own experience.
There's no doubt the OP was targeted, either because he has an "obscure" Immigration record (like living for years on visa exempts) or just because of his country/name/appearance/place where the DTV was issued.