It seems you are going to encourage the spamming of addresses with your chosen method.
What's to stop people from generating a large number of addresses to claim multiple shares of airdrop? Is this what you want?
Maybe you should impose some limits, such as restricting to one address per email (it's more work for the multi-claimers) or only allowing eth addresses that have any non-zero amount in them
Yes exactly, when we were doing the airdrop in the thread on this forum it was restricted only to past users.
Now that we will do a website, we will find other ways of restricting (ex. By IP), abusers will be excluded from the Genesis.