The Rocket Community Challenge is officially underway. Each week, this space will highlight limited-time prizes and opportunities to amplify your impact. Week 1 (August 3 at 12pm ET through August 10 at 11:59am ET) is all about building momentum with matching funds and a special focus on championing small nonprofits. There's no better time to get involved and help your favorite nonprofit get ahead. Here's what's happening this week: