Even empty token accounts contain SOL. Those accounts can be closed on request.
50% of the remaining SOL would be transferred to your wallet, 50% will go to MillionSols.
Burn unwanted and spam NFTs
The remaining SOL (about 0.002) of the closed token account will be transfered to MillionSols treasury. After sending the instruction, the NFT will be destroyed permanently, this cannot be undone!