Twitter is making its money on the run.

The micro-blogging social media service earns a majority of its revenue from ads shown on its mobile platform, the Wall Street Journal reports.

Company executives told the outlet that this is because mobile Twitter users are more likely to touch and interact with ads, which is how the company earns money for ads.

The news might seem surprising considering that Twitter only began offering mobile advertisements in April. Not to mention, Facebook--the only social media network with more users than Twitter--has been maligned for its weak mobile advertisement capabilities.

Ads appear in a uniform format on Twitter, regardless if they are viewed on a mobile application or via a desktop platform, the Journal reports. Twitter also said that its high mobile revenues may be due to its users being more active on the site via mobile devices than desktops.