If used with Scatter, the site tries to sign several contracts.
I found that some of the addresses involved pop up when I search for scams + EOS.
Thanks for all the replies!
It's good that you ask the community before trusting that site.
Because it really smells like a scam for the beginning, the design of the site and how it age in less than a year? And I'm not really sure if EOS is making an airdrop though. So if you want to know about any airdrop or the latest about EOS you better follow them on their official social media sites, like Twitter.