If you have a Keybase account, or if you create a new Keybase account and link your GitHub or HackerNews account(s) that were created before the announcement, you should be eligible to receive a giveaway (airdrop) of the cryptocurrency called Stellar Lumens.
I received about $20 worth of Lumens last night, and they're giving away more each month divided equally between everyone who joins and is eligible.
As a surprise gift, the Stellar Development Foundation just starting sending 100 million Lumens, worth $5 million USD, to 300,000 Keybase users. There are lots of different tokens on Stellar, but Lumens are Stellar's native token, and SDF wants real people of the world to have them.
This surprise giveaway translated to something like $19.54 USD worth of Lumens for each active Keybase user. No strings attached, and those Lumens are going out now, to be delivered by Sept 13th or so.
But that's only the beginning.
SDF is dropping 100 million Lumens next month. And the month after that.
In total, they are giving 2 billion Lumens (roughly $117 million USD) out using Keybase over the next 20 months. On the 15th of each month (starting Oct 15, 2019), SDF will give the next batch, divided equally among everyone.
Those who join now will participate every month until the end. So people who join earlier will get more.
To qualify: you must have a Keybase account registered before this announcement OR if you're new to Keybase, you must connect your Keybase account to a GitHub or HackerNews account that was registered before this announcement. This is to prevent bot signups to Keybase.
More details here:https://keybase.io/airdrop
And for reference, here's a link to the Keybase thread on this forum