Bloomberg reports, according to sources with knowledge of his plans, that billionaire Dan Gilbert is looking to sell his stake in six casinos, which include Greektown Casino in Detroit. Though Bloomberg gravely misstates Gilbert's motivation for getting into the business in the first place —"[he] began eyeing gambling as part of a strategy to revive struggling downtowns in older U.S. cities" is a weird way of saying "he began eyeing gambling as a strategy to make boatloads of money for himself"— the nuts and bolts here fit into the modern environment of gaming.…