This used to be true back when the FAA only required hobbyists to register themselves. However, they now also have to enter the serial numbers for any drones that weigh more than 0.55 pounds, so it's fair to say hobbyists are no longer only...
The FAA states here that "drones which are required to be registered or are registered, including those flown for recreation, business, or public safety, must comply with the rule on Remote ID".
You can remove any added drone from your inventory...
FWIW, I don't think what they are doing is legal, so past experiences aren't guaranteed to play out the same way in the future. However, sellers have been misrepresenting products when shipping internationally for a long time.
With that said, I...