Class Discussion - Online Gambling

One thing in class that we discussed today involved online gambling and how it is illegal. I myself take part in online gambling through the program "Bodog Poker". What I don't understand is that there are hundreds of online poker ads that run on tv every day promoting it. If it is illegal in the United States, then why are these companies allowed to place their ads on tv with the intention of getting the American citizen involved? I feel that there should be some government regulation involved with online gambling and its promotion towards the American public on tv. Personally, I like gambling online and have won over $2,000 on Bodog. If only my money was won legally...