None because i never participated in any of those mentioned, For me it is a waste of time though some airdrops really pays , but majority is a Bullshit scam so why waste my time when i can earn in something worth spending my time?
True, spending time hunting down some Airdrops is a waste as not all of them pay off and also not all of them can be of value as expected, so Airdrops are not a job to be hunted like the others, even if you have spare time to hunt them.