I don't know and also i don't try it to search in the other ways like twitter. But it is possible if you want to earn bitcoin then why you are not working in this forum? Because in it you have different and a lot of signature campaigns are here, you could join easily and start to earn.
If you be in campaigns only to earn bitcoins, they would not accept in campaign also first. You be most promising campaign now and please don't give suggestion like this. Newbies will get affected because this. @op. I hope, you have already got a answer about your question. Now you could lock this thread to stop repeated same answers.