I don't see any details on this in my keybase, it's a big confusing to say something has already happened and I'm wondering if I was included or not... I've verified my HN and GitHub.
Perhaps it's still being rolled out, can't complain :)
I had to fully quit the app and launch it again before the "airdrop" button appeared. Still unsure myself about the first airdrop. I used my account regularly, was able to join the airdrop so meet all the criteria, but havne't had any Lumens added to my wallet.