I just want to answer the first number,
when I started,
I "Mined" bitcoin from faucets and giveaway,
and after I get some coin,
I invested it on cloud mining, so I can get coin while doing nothing....
You aren't really "mining" coins when you are using faucets or giveaways. Mining only refers to the process of solving hashes in order to find a valid hash that makes you eligible for adding a new block to the block chain.