1. Retention drives acquisition: As you retain more users, those additional users take more of the key actions that accelerate acquisition, either through sharing, inviting, word-of-mouth, or creating content.
"Behance, for example, recently held a worldwide Behance Portfolio Review Week. With 153 events taking place in 46 countries, the initiative was highly successful, bringing together nearly 4,000 Behance users to critique one another's portfolios."