I think the bounty thread is very helpful to the project team, but the air drop is not very helpful to the project team.
Most of the time, air drops only attract people to sell tokens, and even negative publicity for the team.
Mostly, airdrops isn't the helpful in a major way. Most airdrops are scam and I think it is not good to just rely on it. It is still better to join bounty Campaigns and invest in Cryptos to earn money. Hardworks gives bounty hunters the opportunity to see the future. While airdrops let us see it without the assurance of having it.