Hive is working well for me. I'm just not very prolific and don't like to spend too much time on any social media. I think if you are serious about appealing to many more people, you may need to analyze your target demographic more carefully, and come up with a campaign based on that. Word of mouth or individual persuasion isn't going to work at any kind of scale - you need to build mass momentum, which is often highly unpredictable and subject to forces far beyond our control.