Not a lot of Bitcoin bookies were added on the poll that's why I only voted for Nitrogensports, Cloudbet and Others(Bitcoinrush, Sportsbet, Fairlay). Most people voted for William Hill, Betfair and Pinnacle I don't take these poll seriously because the results can be easily manipulated.
In this survey among the leaders there are traditional European bookmakers, because the site
http://100bookies.com/ is designed primarily for players from Europe, and most visitors from there at the moment. Visitors from North America, who prefer to play using the cryptocurrency, are still much less on the site, which accordingly affects the overall survey result. In any case, thank you very much for participating in the survey and your comments.