We're disappointed that Yahoo, a longtime business partner of Facebook and a company that has substantially benefited from its association with Facebook, has decided to resort to litigation".[50] The lawsuit claims that Yahoo's patents cover basic social networking ideas such as customizing website users' experiences to their needs, adding that the patents cover ways of targeting ads to individual users.[51] In 2012, Facebook App Center, an online mobile store, was rolled out. The store initially had 500 Facebook apps which were mostly games[52]