Thank u
Naha
Most of airdrop project don't want to minimum value in MEW account or any WRC20 Support wallet. But Some good and valuable airdrop project require to minimum fund in wallet. But for Join bounty campaign you don't need any require to add some ETH in you wallet.
But If you want you can add some eth in your wallet because when you get Some Token and if you want to sell your token and want to transfer your token with any exchange wallet that's time you will be pay gas fee to your transaction. So if you want you can add some eth in your wallet for gas fee.