So for example you want to make the car you suggested be VIP and not a Free to everyone, there could be some Sub-Category for this dedicated for exclusivity.
Here would be the Sub-Categories
- Free
- Group Exclusive
- VIP
- Achievement
- Limited
- Favorite
Now, it would still be possible to not use any of the Sub-Category but it would basically render them as useless since nobody will use them if it’s the case