[knc1]

The ones that where compiled statically may have been:
targeting GTK+ V-3
targeting some not so current firmware version
targeting some not so current touchscreen model
or the poster just made the same mistake you almost did.

If you hit a post by twobob -
those are most certainly correct (for the device/firmware version he was targeting).
He ported a lot of things to the Kindle while he was here.

Edit:
The mention of twobob and very long lists of libraries just sparked a memory.

Since (at the time) Kindle firmware did not ship with the build-time version control symbolic links, he would copy the firmware libraries to where he was building and then include them in the build commands, so that the linker could find them, not so the build would be static.

Edit-2:
I haven't checked recently, but I don't think QT is pre-installed.
Amazon would not want to be paying the license fees for commercial use.
QT is only free for non-commercial use.

The folks behind the Gimp ToolKit did not impose fees on the users, commercial or otherwise.