Its more MMO than DayZ, although i think there are some comparisons between DayZ & SC (bandits = pirates, zombies = NPC) the server you'd be playing in would be controlled by CIG, whereas DayZ someone is renting that server and connecting to a master which says where you are, what you own etc. So in DayZ there isnt any official servers (not to my knowledge anyway, its been a couple of months since ive bothered) and its upto the owner who paid for it what goes on in there.
In SC its more like battlefield, where you have ranked (official SC server) and unranked (any private server you set up) but anything happening in an unofficial server has zero impact or relevance, its been allowed so that they can support open modding in the community, and anything they deem to be of a high enough quality and suitably balanced to be fitting in their universe, they'll release into the universe too.
With this model you have described, do you not feel that the player base might be too spread out to make the official servers enjoyable?
Dave and his school mates, might just rent there own server, hack in all the best ships and gear and just play silly buggers. While no impact on the official server, it takes away players from the official world?
I can understand their decision, but i can't help feel they should have just left Single Player + Multiplayer dog fight modes separate from the MMO, so the private servers don't eat into the official MMO servers player base.
But who knows, I'm sure we'll see soon enough.