I have bought areas in the game then I went on members my question is if I let go of my membership do I have to buy these areas again or do I keep the areas I've already bought?
Zones you've purchased with Crowns are paid for on that account forever. You will never be asked to re-purchase those zones.
You can access all the purchased Zones on every character on that account, once they have completed the storyline prerequisite to enter those areas of course.
