they do little task like follow a twitter page or like a Facebook they mostly dont get the reward
that is not "airdrop" that is a "payment" for a job that they do. the job is small and meaningless (an advertisement of sorts) but it still is a job and they are getting paid for doing it so you can't call it an "airdrop".
a real airdrop is when the Byteball team gave away coins to anybody who owned bitcoin at a certain block height and downloaded their wallet. another example is bitcoin-cash which gave away free coins to anybody who had bitcoin.
neither one of airdrops or these payments have ever been good for beginners. they both add complications and require the beginner to download another wallet and most of the times the altcoin wallets are pretty bad and in some cases some of them even contained malware.
If i am not wrong Airdrop were given in 2016-17 , where you just have to fill the form and give the wallet address of the said coin and you get free coins according to your rank or certain limit. But after 2018 even in Airdrop they started to give small tasks to fill so they get paid and that too the reward profit is too less as lot of users join Airdrop and distribution gets low so Today earning in Airdrop is just like earning in faucet.
What OP is telling about is social media bounty where you have to follow the project and like and share their post. and you get reward for that and that too is very low in today market as in this bounty also lot of users join and the reward split gets low