Luria Nova recently TOed some regions, among them Aveston. With 725 peasants out of 8300 possible, almost starving, at 'Stopped' production with no knights nor lord, it produced 488 gold for the Duke. A little too good to be true, right?
The first tax. That's gold that had accumulated over a potentially large period of time. Happens sometimes with regions just TOed, especially on Dwilight.