Actually these tasks is just speculation that we hope that we will be given airdrop if we interect with testnet and mainnet , this why these airdrops called retroactive airdrop where no Guranatee for airdrop
This clarified uncertainties is one of the reason why many people to abstain from looking after airdrops because they know they are nothing than just a testnet experimental offers which amount to nothing at the end than a waste of time though it has also been found useful in helping the newbies through their first stage of learning about making a transaction in cryptocurrency among other benefits it serves, people also give this kind of negative approach or feedback on it because they don't like the way it's scam is fast increasing.