Then , there were the odds - checking sites such as Oddschecker , which placed the big bookmakers on the same footing as numerous small entrants .
Then , there served to put pressure on industry margins by making prices more visible and encouraging a greater intensity of competition .
Then , there were the odds - checking sites such as Oddschecker , which placed the big bookmakers on the same footing as numerous small entrants , and served to put pressure on industry margins by making prices more visible and encouraging a greater intensity of competition .