Try to explore this forum first and learn from different users that are posting in here. There's different ways on how your'e going to earn bitcoins in this forum. The easiest is what you have mentioned , the signature campaign but for now most of the startup companies choose higher rank's because they prefer the users that has quality post and seriously posting good sentence's to answer questions. So it will take time for you if your'e just a newbie. Think of it like a sideline so you wont get bored while waiting and read some of the threads here so that, you will be more knowledgeable.