TRADESPORT.COM CEASED OPERATING ON NOVEMBER 18TH, 2008. You will be directed to BookMaker.com from these review pages. Tradesports.com is a new style sports betting site, which works more like a stock exchange than an actual sportsbook. You can actually buy shares of a particular line, then sell them to prospective buyers. The shares can go up or down depending on whether the line you bought is getting popular, thus driving the price up. It's very involved and hard to explain, and therefore I'd point you to the Tradesports.com website for further details.