The contract sells whenever it reaches 3,5 Million tokens accumulated from taxes. (This number can be changed at anytime depends on the price of ThunderBNB to make not-so-big sell).
Holders' sells trigger the contract to do 4 smalls that split into: BNB rewards (8%), THOREUM rewards (2%), Dev & Marketing fund (4%), Automatic Liquidity or Buyback & Burn fund (4%) . This accumulates in the contract, dev and marketing wallets as $BNB, $THOREUM as previously described.