Unity – one of the leading 3D content engines – has acquired mobile app specialist ironSource for $4.4 billion. This marks a blatant attempt for one of the hottest media engines to vertically consolidate all parts of the 3D media ecosystem, as it preaches the importance of creating synergies between content creation and monetization at the early stages of media development. Unity is betting much of its future expansion on its ability to infiltrate the in-game advertising market, and a huge acquisition like this is bound to turn a few heads. Tel Aviv-based ironSource serves over 3 billion monthly active users, offering developers the monetization, marketing and analytics tools needed to scale mobile apps. ironSource will allow Unity to strengthen…