This is not the first time that PayPal has waded into politically fraught territory. In 2010, the company cut off payments to WikiLeaks. More recently, PayPal stopped working with neo-Nazi and alt-right websites.
Records from 2014 show that Mr. Joness operations were bringing in nearly $20 million, mostly from supplements, such as Super Male Vitality, which purports to increase testosterone, that he hawks on his radio shows, The New York Times recently reported.
Since being barred from Facebook and Twitter, Infowars has had to find new online platforms, and its audience has fallen off significantly. But PayPals decision may be particularly damaging, because it will be much harder for Infowars to find another company to handle transactions for the site.
For now, Infowars is still able to sell at least some of its goods on Amazon and eBay, where its payments are not handled by PayPal.
An article on the Infowars site that announced PayPals decision said the move was a political ploy designed to financially sabotage an influential media outlet just weeks before the midterm elections.
The article said PayPal had told Infowars that the decision was made because Infowars had violated its acceptable use policy. PayPals spokesman said its decision went beyond the violation of any single policy.
Right Wing Watch, a progressive advocacy organization, published an article in August pointing out areas where Infowars appeared to be violating PayPals terms of service. At the time, PayPal did not take action and offered no comment.
Infowars did not respond to an email requesting comment.