No staking. No yield. No cashback. No airdrop. Burning raises your tier and nothing else.
No. It is bought and burned. There is no staking, yield, cashback, or airdrop.
It raises your unlock tier, which raises your pocket cap and session-key count. Nothing else changes.
To the dead address. The total on this page is that address's balance, read from the token contract.
No. Supply is fixed at deployment and only ever moves in one direction, downward, through burns.