[bemused]

Well I really dont want to critize GNOME developers for working on free software, paid or not. But GTK is still perceived as a more universal toolkit than "just GNOME" and this might be a time-consuming surprise that hits application developers

furthermore it is still advertised like this as well (from gtk.org):

What is GTK+, and how can I use it? GTK+, or the GIMP Toolkit, is a multi-platform toolkit for creating graphical user interfaces.

Where can I use it? Everywhere! GTK+ is cross-platform and boasts an easy to use API, speeding up your development time.

from my point of view, this is not exactly true anymore ..