Just checked their thread at bitcointalk, very good description of bounty terms and conditions for participants! Like it. If the whole project is managed like this, consider, can trust their team.
You must be referring to this description I guess 
:hey dev, any airdrop or bounty camapign ?
Hello. No Airdrop or free worthless coins. As for bounties - make software or useful scripts for Karbo and receive a reward, such as advanced pool software, advanced faucet software, web-wallet, exchange script, advanced payment gateway or e-commerce plugins. If you're developer join us to receive a reward for your work. No social media or signature bounties. No translation bounties ATM.