Same problem here... slack user name not on the list and no airdrop. I found my email user name. Hope this gets sorted out quickly.

I can appreciate why this is a concern for everyone. In this case, since all the payments have been made, we are not able to make any additional payouts for those that missed out on the airdrop. I know that this is not the answer that you were all hoping for, and for that, I apologize. Slack Usernames are not the same as your display name. In some cases, when adding a name from Slack, some users provided their display name rather than their username. When we did our search for this information, and it could not be validated, it resulted in a no for the airdrop. Again, I know that this is not the resolution that you were all hoping for. If you have any additional questions, feel free to reach out to me.
Really this is not the answer I was hoping for.
Your team disappointed me.
There were multiple posts regarding the update on the airdrop from me on the bitcointalk forum but no one replied. There was no communication from your team about who all qualify for the airdrop. I just want my share of coins from the airdrop.
Actually, I'm feeling angry now rather than being sad