In most cases it depends on the project before one can conclude that either the airdrop or bounty kills the project. If a project on its own is not good and does not have prospect for the investors, either the airdrop or the bounty of such project will not be good as well. So, if airdrop or bounty of a project is not good, it could be that the project is a scam or it lacks partners.What is important to look out for in a crypto project is what future prospect does the project have and how valuable is their coins. Sometimes as well,one may need to also find out who the partners with such projects are. Hence, either the airdrop or bounty of a crypto project could kill the project depending on such project.