Sports Behind the bet: how illegal online books work WUFT | By Alexis Ashby Published January 25, 2023 at 9:00 AM EST Facebook Twitter LinkedIn Email In states where sports betting is illegal, many people are forced to partake through bookmakers, or bookies for short. Some students estimated that at least 20 percent and perhaps as high as 65% of sports fans at the University of Florida participate in illegal online sports betting.