Dev sending the premines to his shill accounts 
Its a trend now these so called airdrop
Check the testnet thread Its a trend now these so called airdrophttps://bitcointalk.org/index.php?topic=1525078.0
The members helped dev, it's not fake...
At 20 Mar 2017 dev wrote...
"I am reconsidering the launch of Clarity, because one chain will be quite a lot to handle on it's own. One of the community members suggested we do the dev rewards instead, so I opened a poll for that. This would mean there would be some premine to reward community members and testers. "