thanks to this explanation, indeed now many emerging airdrop and bounty new scam, and I have encountered it, and with this more be more careful again in joining the airdrop and bounty.
As a beginner,you can still earn without risk.Yes you are right that somehow some bounty campaigns are scam so you have the right to choose which bounty you'd like to join.Be sure that it is legit.Research before sign up for a campaign.