Does any one know which of the exchanges have promised to give the depositors a 1:1 coin for the BTCs that they hold in the exchange wallets ? (Since crypto exchanges control the private keys and not the people who have deposited their money there, they are not legally bound to give the holders a share of the BTG coins )

Do you know if i hold my BTC in wallets by zebpay/uno coin, they might issue a 1:1 BTG for every BTC ?