That's assuming a paid crew would have no passion . Maybe you are right. Lets see it does not matter because I believe money does not matter.
There's also the matter of a sort of guarantee of minimum level of skill and quality, passion cannot guarantee that (as *I* have seen in other games where players run the RP ). This could also be monitored. There could be a quality thing that you can submit for feedback for example, solutions can be devised. A way to say that you did not like certain event.
I'd rather not see 'events' at all (too artificial), but more like it was in Seed: you just RP and so do the GMs, and some of the time you don't even know if a character is a GM or dev or not. Me too, but there are 100 registered users here not 5000, To have something to demand when you pay is different, I agree.
If GMs come from the community... this one? Not many of us would have the time and not all would want to. From a broader community who flock to the game after it becomes open source? I am sure there will be enough people to run events. Even having 10 ppl that are storytelling regularly you will have a pretty decent constant storyline.
Ok, I am not saying that Seed open will be better than a payed one. I am just saying that you want something it will never be, and you will never be satisfied with something that will be close. It will maybe slowly develop (btw if we see not game projects in the open-source they actually develop faster than closed source, and better eventually.) but it will have a constant growing. It will not fail because of no commercial success. (Ok, we will have maybe unstable and laggy server but this are just problems that can be fixed.)