But that was due to their design of only being able to have 8 people hosted on a peer network. If bungie wanted to they could've payed for dedicated servers that could hosts 100's at a time in open worlds reducing the number or servers (also would've had to generate a little more area per patrol but that's very easy to do in game). They specifically designed (or cheaped out) and made the game into an MO instead of an MMO.