Todd Spangler NY Digital EditorElon Musk, the mega-billionaire Twitter power user who last week clinched a deal to acquire the company, has floated a new idea for the social network make money.Musk on Tuesday posted that Twitter may impose “a slight cost” for companies or government accounts to use the service, without elaborating.“Ultimately, the downfall of the Freemasons was giving away their stonecutting services for nothing,” Musk tweeted. “Twitter will always be free for casual users, but maybe a slight cost for commercial/government users.”To be sure, it’s just Musk spitballing at this point about what may happen once he closes the $44 billion deal to buy Twitter.