Amazon's game streaming service Luna is opening to all Prime members starting on Prime Day, June 21 and 22; US Prime members can start a seven day trial today (James Vincent/The Verge)

James Vincent / The Verge:
Amazon's game streaming service Luna is opening to all Prime members starting on Prime Day, June 21 and 22; US Prime members can start a seven day trial today  —  Get a free 7-day trial and play from Windows, PC, and mobile  —  Amazon is opening up access to its game streaming service Luna …