Between one or two years ago, I spend at least 2 month researching and collecting airdrops. This means around 100-150hours.
Outcome (worth) status today: 1x250€ 1x125€ 1x 40€ 1x10€ 1x7€ 1x3€ 2x2€ 1x0.5€ 6x0.1€ and 28 less then 0.05.
To sum up: 440€ in 43 coins with 150h effort. (2.9€/h)
ONLY AIRDROPS with no coin or no money investing considered. The most one's with invest's went rather more horrible, and at this time the scam portion was much lower then today.
So, make up your own mind!