Also I don't think GMs have an aim for us, as they say in the first post

"Bear in mind that this is character driven. There is no plot or story over-arcing the whole thing, everything is up to the players to decide. However, I and a co-GM will decide circumstances and the outcome of certain choices, much like a DM does. But you can pretty much make up what you discover. If you’re not sure, PM a GM."

This seems pretty player driven