UPDATE: Well what do you know...the first logical reply I've received from DJI. Looks like YOU CAN DEFINITELY transfer your Care Refresh to a newly purchased new Mavic (or similar) so long as the original product was returned to the store (does not have to be DJI's own DJI Direct)....
quote from DJI today:
"Thank you for contacting DJI Care Customer Support.
In cases where you end up returning the product, we can transfer the plan only to a similar unit. Once you have received the new drone, please provide the following information:
- New Aircraft Body S/N
- Old Aircraft Body S/N
- Proof of return"