I won't suggest a newbie to join a sig campaign for earning, i would suggest him to keep reading the posts and learning the things until he reaches jr. member or above because by then he will have a little knowledge and won't be spamming around.
That's true. As said while reading will get a detailed knowledge about bitcoin. Newbies can try with faucets for their earning if they can spend long time.
Perfectly said it is very good because you can get lot of knowledge about not only bitcoin but also about other alt coins which are good for trading and you can know more about how to sell and buy products for bitcoin and do some skill job which suites you for bitcoins.