I am pretty sure in English serverless means no server and "unprovisioned/unconfigurable" machines means you didn't provision them and you cannot configure them. Even in analogical sense this makes no sense. Something i could relate to is something like "Pay as you use" or "configurationless servers".
But that is just me, and if you think it is ok to randomly change the meaning of words that means me personally and randomly don't need to accept your new meaning (not giving out, just trying to explain my rationale)
Downvote all you want, but please do point out where i am wrong.