I don't know what happened but I've joined the airdrop 12 days ago, everything seemed fine, but I didn't receive any coins. Any hints as to what may have happened?
I think you should join in slack and clarify this to Dev.
The airdrop rules submitted by Dev are:
1. 1 IP 1 account
2. 1 email 1 account
3. Airdrop ends September 30, 2017
As long as it does not violate the airdrop regulations, I think you have a right to clarify this. Ask directly to Dev at
https://slack.ebtc.io/ and provide your data to Dev. Dev has all airdrop participants data to be clarified whether there are any violations from you or errors of the Dev itself.
Unlikely Dev can find your complaint here, it's too hard to see all the replies in the thread. Good luck brother.