There is no way to earn many bitcoins instantly, gambling is the only answer to earn bitcoins instantly. I think signature campaign is good for earning bitcoin even it's not instant.
This method must work ... I see you and about a hundred others making shitposts with a signature. Though I am sure one only makes
tens of dollars worth this way.
Not only signature campaign is a source of bitcoins here you can also try doing some bounty that you can see in altcoin announcement they are giving altcoin after than the bounty like avatart campaign share twit and facebook campaign then you can choose after receive altcoin either holding it or selling it if the altcoin has a potencial to grow in the future just hold it and sell it when the price is high... if not just sell it right now..