I wll always subscribe to bounty, because it is more effective compared to airdrop. Airdrop can help to build the community, but bounty tends to create more awareness about the project, most especially to communities of investors.
maybe some people who are in this forum have felt how the bounty provides a great benefit to his life. even though now it's not so good, but we still have to be positive if the bounty will return to benefit everyone.