While these airdrop projects are mostly uncertain, a ton of these projects are either scam projects or projects that ended up as dust, I.e, become worthless. I have tried a couple of them and still trying to do a few but the result you get from it most times feels like not trying it again some more time. They are not really as rewarding though I have friends who are more committed to it than myself and they mention a few of the rewards they get from participating from these airdrops, yet when I measure it with the time spent and efforts put on it, it still doesn't measure up to me.
I'm still participating in projects like PAWS, GRASS, NODEPAD, MAJOR, BLUM and MEMEFI but unlike before when I used to be deeply involved in mining these mini apps, my participation level have dropped significantly recently. It just so happens that anytime I feel like quiting them, my instinct will say keep doing a few of these and whatever materializes from them can be managed by me. At least, it's better than none. But on the other hand, I don't rest my shoulder on depending on these airdrops whatsoever.