Re: why most of airdrops don't pay participants with tokens in these days??
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Would up this again if I would since one particular project tried to even steal my MEW wallet back in the days and thankfully I was not fool enough to just be baited into their phishing site. I know people still fall for those, but come on, that was like an old fashioned way. 
Kinda scary to those who really went all in and disclosed their personal information though.
But sometimes they are just playing tricks on people who want to participate in the Airdrop, you should look in detail about what they are asking to collect data on you. Maybe all this is just a way to sell your data.