There are sites or platforms that already have the list of airdrops that you could participate and also the upcoming airdrops.
I just forget the name of those sites since I didn't receive any airdrops back then.
Indeed. It was really hard to find legible and reliable airdrop nowadays due to some contributing factors. Even if you can find one, there is still no assurance that the airdrop you have found is legible and profitable once you have done or accomplished to be able to be credited as a participant into an airdrop you have engaged with. Airdrops are one of the profitable ways possible on earning into this industry we are all currently with but as times passes by, it seems that even you find airdrops from the internet, still you wouldn't know if you can expect profit from the airdrop you have joined. It will now be a series of trial and error. Better to take a try so that you can be able to know which is profitable and worthy. If you are really into airdrops, then trying to join into the extent of what you can will be the best thing to do and just wait up for the results to come once the airdrop event has already been done. But as per my experience it takes too long for some airdrops to distribute the reward even the event was done. I do not totally know why but those are just some of my experiences.