1. Yes, you can update a winner’s rewards after the winners have been updated.
2. You only need to update the winner again with the new rewards. This means you go the Update Airdrop Details tab, put in the airdrop smartcontract address, put the user’s wallet address in the winners tab whose rewards you want to update, put the new reward amount in the rewards tab and then click update.
3. You can also update multiple winners with the same method. Multiple wallet addresses need to be separated commas and there should be as many comma separated rewards as the number of winners.

*We are not responsible for failed transactions.

This transaction does incur gas fees.