Unfortunately, there is 1 Update, but it does not Address this Issue. Requirements for Limited Offline.....
13 Race Flags (Race Goals Completed) - Split Screen Mode is Available (2-4 Player only)
23 or 26 Race Flags - Quick Races (Challenges) Unlocked.
Only way I think this could be Transferred to others is....
User has a Legit System, and gets the 23-26 Races done.
Exploits the System (SX OS or Atmosphere) and still keeps the Game/Saves
Uses Checkpoint, or another Save Backup Tool to create a Backup.
But possibly the Saves will be Linked to the System ID, User ID. I seem to remember someone Posting a Image of a CFG File and it having a Device ID and User ID Number. Could be Edited, but until this is done, will never know. If the SX OS Team has indeed found a way to get SX on Patched/Lite Systems, you might see it done soon, if it will Work as I described.