After his expensive Twitter takeover, tech billionaire Elon Musk wants to earn money by making users pay for verified accounts, according to tech industry media reports. So far, having your Twitter account verified with a blue tick to guarantee the authenticity of your profile has been free of charge, albeit limited mainly to celebrities, companies and users with many followers such as politicians and journalists. Tech blogs Platformer and The Verge both reported on Monday that the verification ticks will in future only be available to customers of the Twitter Blue subscription service, which …