As far as i think the most easiest way to earn money is engaging with airdrop campaigns but it is always not as sure as bounty programes. Because most of the airdrop campaigns are scams while bounty programes, most of the time sure. If you are looking for a real and reliable programe to earn token just join the Daneel bounty programe and earn worthy free tokens which may change your crypto world
I prefered bounty though the term of the campaign will run from 4 weeks to 8 weeks, it's worth the wait.
An airdrop is meant to be an absolutely free distribution of a token. It's meant to be a method of distributing a token to somebody, without the hard ways to get it. Airdrops are literally meant to be conducted via a simple registration form or snapshot and bounty is the most common type of distribution of crypto where you promote or advertise a company through wearing their logo through a so called signature in our account.