i don't think OP can get nice amount of BTC if he still a newbie
For the Bitin.io or 777coin sig campaign, he can get 0.00004 btc per post.
At min posting requirement (20 posts per week), he can get 0.0008 btc a week.
It will be less than what he can get from faucets (50 cents a week according to his post), but the task is much simpler as he just need to make 3 posts a day, instead of typing lots of captcha.
At max posting limit (100 posts per week), he can get 0.004 btc a week.
The payment rate will be higher as he gets leveled up to jr member and members and he will have a lot more choices then.