I used to have accounts and shop around for the best odds at 30+ bookmakers. You can beat the market just by shopping for the best odds alone. unfortunately these books only accept lower limits and kick out winning players. It was quite the challenge to move over to the asian market who allow winning players since their lines are consistently set quite tight. I'm only really using Sportmarket Pro now which I would no longer do without (read my review) They let you automatically shop for the best odds and bet from their platform (only only real bookmakers that offer high limits and don't restrict winning players)