It sounds as if the old editor has to go asap because it's getting too expensive.
vBulletin used to do that from time to time and afaik they even paid out the developers of the addons. IPS is doing it too, for example Pages databases in Clubs was an application by Sonya* but I don't think she was asked or even got any money. Please correct me if I'm wrong with this.
I'm prepared, none of my important projects uses IPS anymore. From former 7 licenses only one is still active.
True. And that is why in my opinion closing the Marketplace was a good thing, we have more freedom and no more limitations.