For indie games there is supposed to be a royalty based license, once the engine is ready and released. What exactly fits into an indie category will be defined later, but it's likely that it will work through Outerra World platform (with OT login and world/game data syncing built into the engine).
HLA/DIS and CIGI support is being implemented in special version intended normally for per-seat licensing, for use with civil and military simulators and entertainment devices. Some of these uses are already possible with early versions, but it depends on your requirements and plans. Other licensing options can be individually considered too. Please write to contact at outerra.com with some initial info. In this state we usually need to assess the project potential and whether its development and business plan fits with our dev path and could be successfully carried out for both parties, so any info that can make that clear is welcome.