Sage tried to load the show floor with attendees at Summit in Las Vegas in July by piling big-name speakers on the keynote stage. Someone who has priced speakers says Magic Johnson’s fee is $60,000 “and you have to buy fuel for his jet.” Add in Karl Rove and Jessica Alba and lesser-known figures, Robert Gibbs and Biz Stone and the bill for bringing in some national press and the rest of the cost of conferences in Vegas and you get some big bucks.