1. Register at Stellar - https://launch.stellar.org/#/register
2. Confirm account with Facebook - 1250 Stellars Earned
3. Confirm email - 1000 Stellars Earned
4. Send 1000 Stellars to someone and it'll get replenished with no changes to your balance.
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5. Register at Justcoin - https://justcoin.com/
6. Confirm your account.
7. Send Stellars to your Justcoin account and exchange it for BTC.
After all this, you've earned 2250 Stellars but you only can send 2200 due to 50 being the minimum balance.
2200 - 0.004 BTC
Congratulations, you've just earned 0.004 BTC with pretty-much no effort!
You can repeat these steps if you have old Facebook accounts.
They have changed the amount of STR given for fb and email confirmation since 9th august, you will only get 125 STR now, but you can earn additional stellar if you insert an invite code from a friend / other member