Since the federal ban on sports betting was no longer in the way, states were able to determine for themselves whether they wanted to legalize and regulate this hobby. While the market has been operating for decades, it wasn’t until 2018 with the repeal of the PASPA law that legal betting started gaining traction in the US. Nowadays there are hundreds of legal online sports betting sites available to the American public, depending on where you live. Online betting in the United States has grown in popularity exponentially over the last 15 years.