He explicitly said they are not releasing the server code.

Plowing through that mountainous transcript was not easy at all.

Here is the near near-gibberish that seems to constitute the relevant (and ultimately depressing) part:

Rand: We ah, we, lets see here, We're rolling down the, ah, I'll make a story out of this...we're chugging down the open source path because we don't really have anything else to do, and we're hoping for things to do because we've laid off people we don't have any income and we need kind of money and then this other deal came in where people said well hey, we'd kind of like you to use your engine and do this stuff for us, and suddenly Mark DeForest who was the engineer of the Open Source Train, choo choo -[makes pulling whistle cord motion], suddenly got involved in other things and we have our plans laid of what we need to do, and some of it is just technical, we'll pull certain things out that are, that we’ve licensed that we can't just let the public use and we have to, we have plug ins that we have to be careful with letting out, and we’ve got a plan about how to do it but suddenly Mark DeForest was engaged in money-bringing-in-work so that took priority, so we still have no other plans other than to do Open Source and like to move it out there, this time we are thinking we want to do
something a little different... boy its been a while since we did all of this, ..but it’s… we’d like to run the server, or run servers, and, but still have Open Source where people are able to build stuff and adjust stuff but We'd be more the keeper of it. mm. and see where that goes, cause it seemed like that might be a cool way to do it that way, we'd keep things going but its still passing thru a filter, m, but anyway that’s the plans, and as soon as really we run out of work we will get back on that.

[Audience laughter]

01:05:56: Questioner: A followup question. Are you planning on releasing the server code and the engine code separately so you could just run URU and (plug) another engine into it, or does it have to be together?

[Crowd murmuring]

Rand: I think it is a fit together kind of thing, and some of that is, we, I mean, OK so, we planned for the future we’ve opened it up where, all of this is this weird parallel with the D'ni universe (Dunney) where we want whoever wants to be a write to be a writer, and , at the same time there is like these you know Master Writers who we like to think of ourselves as, who potentially like could make new books that we could add in that might be income producing but keeping it all together
and letting you guys write stuff that could be fun to experiment with and potential for us to stick a book in and it would be like, oh, cool, that continues the story ...it seems like a cool way to do that, so, I think we are planning on keeping things tightly tied together.

Cyan Worlds, Inc. has agreed to put the program code sources for Myst Online: Uru Live into open source. The code sources that will be included are the code for the client, all the servers and tools. With the source to the client and the servers, fans should be able to set up and run Myst Online: Uru Live and bring Uru community back online.

Yeah, it does say that. What do YOU think it means when they say they will be the keepers of "it" in the same sentence as "servers"? Also Rand said that what they wanted was for us to be creating content which they want to filter.

If they intended otherwise, when pressed specifically on the server question he could have quite simply said: "yes". But instead he dissembled and gave us to doubletalk about creating content for them. Did you actually even read the transcript?

Look, I am not interpreting ANYTHING or trying to troll here. I've been a software developer for very long time and I know corpspeak inside out. They are not releasing the server code.

Please, the generic question asked by the audience covered all the back end code and Rand's answer clearly says they are keeping it. otherwise how could they FILTER our content?