Third post in the series since the two already got messy with all the replies!
You can mine HBIT here by simply replying with !hivebits or !HBIT
You will receive 0.9 HBIT in your Hive-Engine wallet. The 
Hivebits (HBIT) is a token on Hive-Engine, a sidechain to the Hive blockchain. HBIT is about slowly getting little bits of Hive.
Happy mining!