this is obviously a lucky guy, there is no way to earn that such amount of money from only one airdrop.
I just earnt $10 and that was the max for me, no more..
Yes, it is just luck. I don't know whether or not someone earns more from the airdrop but it is very difficult. I also participated in many airdrop but I didn't earn much.
Plus some that are basically scam airdrops are really hard and mostly just pay look that you will send double to get it exchanged with other coins