not really a scam, but just generally a waste of time.
i've started selling diys at nookazon because selling is a faster process over there, and i really need these diys out of my basement. around 4 am EST for me, i accepted this person's offer of nmt for the wooden bookshelf diy that i was selling. the offer was made two minutes before i accepted it. for those who don't know how nookazon works, once you accept an offering for your listing, you have the choice to immediately send a dodo code so they can come to your island or ask them for a dodo code. i chose to ask them for the dodo, and after thirty minutes of radio silence, i sent them a message saying that i was going to sleep but i would be up in a few hours.
when i woke up, i did send another message and saw that they've been trading with other people based on the reviews on their page. no reply whatsoever. literally hours after i sent the message, they cancelled their offer. i was so annoyed that i wasted my time waiting for this person who didn't even have the decency to say that they didn't want the diy anymore.
i left a 1-star review detailing everything that happened, and they left a 1-star review back, literally just stating, "U know". i don't know if they're trying to intimidate me to update my review with that dumb little comment. i did end up updating it though; i added on, "also this person likes to revenge review even though it's their fault lol"
normally, i'm understanding if mishaps occur during trading, but they've ended up wasting my time, and i lost other offers thanks to the huge time gap.