Are those spreading all over around especially in this forum known to be an "airdrop" is considered an airdrop or bounty campaign since some of those are requiring people to fill up some of the forms or need to sign up or follow some social media accounts, etc?
Since you did some task or work to get those coins.
What happens here is clearly spelt out as Bounty Campaigns and they run for a few weeks repeatedly with participants doing weekly tasks. Airdrops are quite different and they're one time off tasks carried out by participants on social media. Now, most of the airdrops coerce participants to remain in their telegram groups to ensure they keep discussions on. It doesn't go beyond that. Just joining social media groups and submitting ERC/or other wallet address and then wait out for distribution. Airdrop rewards are often tiny bits that often don't worth much when sent.