Hi Dev Team
How About this
To be more beneficial for the game
1, Disable trading and withdrawing for Free Accounts
  1. Give them 15 day period to decide for them to get ViP, else their total Berry will be Moved to Berry Pool for Redistribution
  2. Every Event this Berry Pool Collection will be added as Rewards to ViP players only or create a Gatcha system to draw X number of berries from Berry Pool every day
This way, it will be benefical to economy and will avoid bots and multis just milking the game.
This is FREE to PLAY not FREE to EARN.
Free users can still enjoy the game and spend their berries buying stuuf for their own Speck of Land if they dont want their Berries taken during every 15 day cut off.
Take it in consideration