"Right now the idea is to test Ages on CC and then move them to Uru Live when they are 100% complete."
Perhaps that's your idea, but it's never been my idea. And we have no clue what Cyan will eventually roll out. (And if they're taking suggestions from us, then this post is mine.)
(Requiring ABM/CC as a staging area has all sorts of problems -- starting with the fact that you have to pay money for CC, and it's out of print. Why should anyone bother with that, once UL Age creation becomes possible?)
"Why should we ask Cyan to host Ages that might never be completed when we can test and finish Ages without hosting them on their servers?"
Because Writing will suffocate if you lock it in a closet.
Writing -- and I mean any kind of writing, design, creation -- requires feedback. You do sketches and experiments and start works that may never be finished. And then you show them around! Yes, there will be projects which are developed privately (or in private groups) so that the completed work can be released to the public all at once. But I'm *not* talking about those.
Look at what we're doing on these forums. Sketches, ideas, and snippets. Don't imagine that the GoW forum is some kind of secluded garden -- we're passing this stuff around the Uru community. The forum is a gathering point for the slice of the community who are interested. And the same will be true for Ages. You can post a MP3 file or a screenshot on a web page; posting an Age means walking around in it.
Trust me when I say that the biggest boost that Age creation will ever get is the first time players can link into an Age that one of us created. We *want* that to happen. Soon. The first day it can possibly happen. The first square platform in an empty space that I build in UL, I'm throwing it open to the world. Think it's dull? Outdo me!
(Yes, there may be a separate nexus or server or shard for new, untested, in-progress work. That's a technical detail -- or a boundary of community sorting and approval, which has its own value. But it's not a magic line. The audience is not "the Guild of Writers", but every player who is interested in seeing how player work is coming. In other words: a slice of Uru Live players. And if UL players want to see it, it should be on the UL system.)