TUCSON, Ariz. - Betfair, the online wagering operation, has made offers to California racetracks and horsemen to apply a 10-percent commission on bets made through its betting exchange, a far higher rate than the company applies to its customers in overseas jurisdictions, the company's U.S. president, Stephen Burn, said on Wednesday afternoon during a panel discussion at the University of Arizona Symposium on Racing and Gaming.
