Online advertising stands to gain if Congress lifts online gambling restrictions in the U.S.

The digital advertising rebound may soon have an ace up its sleeve. Congress is on track to retract its ban on internet gambling. The taxes from such a move could send the government as much as $42 billion over the next 10 years. Digital publishers stand to gain a lot from those winnings as well.

Mainly the new legislation would reverse a ban on internet gambling that was passed in 2006, requiring credit card companies to determine whether a customer's transaction is with an online gambling company. If it is, they are expected to reject it. The ban clearly hasn't worked. For starters, the regulations implementing the ban only took effect on June 1.

Online gambling is a huge industry. And one that runs deep with American internet users. But most of those companies are based offshore. This law would allow more companies to exist in the U.S. And tax them appropriately.