Graham Cluley writes: Controversial cryptocurrency developer Tether says it will not devote in to extortionists who are demanding a 500 Bitcoin ransom payment (currently worth approximately US $24 million). According to a�series of tweets�posted by the blockchain and cryptocurrency constitution this weekend, it received a ransom demand on Sunday, warning that if payment was not made within 24 hours, sensitive documents would be leaked online that would harm the bitcoin ecosystem. Read more on GrahamClulely.com.