I love Warframe but it doesn't meet Op:X' needs in that it only supports 4 players at a time. If the game was like a source game and allowed us to admin servers of 32+ people... well, that would be the Holy Grail for us!
With a small group size of 4 people it doesn't benefit Op:X or eGO in any way other than to say "hey check it out, we have an eGO outfit in Warframe!" Basically, we can't advertise eGO to a large number of people, we can't recruit a large number of people, we can't host events for more than 4 people at a time, and we don't need Warframe.