Apple (AAPL) has opened up its App Store to more advertisements as the company pursues more service-related revenue to augment hardware sales. The company has been selling App Store ads tied to specific terms in the search results. In the latest move, Apple is bringing ads to the store’s search tab which will show up above the suggested apps list.  “With Search tab ads, you can capture the attention of these customers before they search,” Apple wrote in a press release. Millions of people visit Apple Store each day in search of their next app.