It looks like Twitter is hoping to earn more ad dollars from mobile app publishers and developers. The company is announcing several new features today that Vice President of Revenue Kevin Weil described as adding up to “an easy and scalable way to drive app installs and app engagement, both on Twitter and off Twitter.” Those include the ability to pay for Promoted Tweets that drive app installs, and to buy ad campaigns that run on both Twitter and the MoPub network. App install ads appear to have taken off for Facebook, and it was previously previously reported by Business Insider and others that Twitter was working on something similar. Weil said that like Twitter’s other ad units, the app install ads began as an “organic” experience on the service.