In terms of Airdrops it's really are hard to find the legit one. Every day there are always airdrop, I think it appears to have 100+ airdrops every day and less that 20 of it are the legit one. To find plenty of it you can join telegram channels, visiting a certain sites, following a certain social sites that pertains to airdrop. but remember not all airdrop are legit most are scams.
If you are looking for good signature campaign or bounty campaign you should do a lot of research and also consult some of your expert friend pertaining bounty hunting.
Finding a good or a potential bounty program is not an easy task you should be careful on choosing one, it's because there are some scam campaigns.
I just finished my research a week ago on finding a good campaign to participate with and I gladly say that its worth to trust and participate with
Its the project Daneel its an A.I (Artificial intelligence) Assistant created and develop to assist, help and guide investors in this cryptoworld.
Bounty name : [BOUNTY-NEW][ICO] 🤖 Daneel.io: The 1st A.I Created To Help Crypto Investors
Website: Daneel.io
Link :
https://bitcointalksearch.org/topic/m.27210952It's really a good project they all pass on my criteria. They are still open for more participants.