The truth is, there's plenty of abuse as people think it's decentralized, therefore no one is watching. They can't see the future, they only see the few cents they can scalp. They won't last for long, no worries.
Price is another factor that attracts and chases people away. When the Hive price is low, they quit as working for a few cents is not worth it. Then when Hive shoots up, they come back.