Seems like LL tried to make rules prohibiting the sale of land to land barons on Zindra but a cursory look shows the opposite. It appears the land barons have accomplished the goal of buying up land for resale making it harder for residents to buy adult land. My suggestion is to track the land sales (single purchase deeded to or set to the same group) and remove them land and put back up for sale.

Unless you want more cut up land.