Nope you do not necessarily have to hold SEED token to be given airdrop however if you want double of the Airdrop you could get a 1000$ worth of SEED and you are qualified
But if you invest 1 ETH, your airdrop amount will get doubled. That was the latest offer I have seen it about this project. Even I got email about it.
I think everyone who got signed up to the airdrop got same mail too but I'm kind of not understanding why I'm not getting the whitepaper mail as well, is it OK to share Whitepaper via mail?
I have not signed for airdrops till now. Do I need to visit suoerbloom site for this airdrops registration? And how I can access the whitepaper?
I hope that they will change they way to access the Whitepaper soon. Sure, they don't want US citizens to invest in the ICO but having to register to view the Whitepaper could also scare other potential investors away.