Probably either A) They don't care for it or don't know much of it or B) People are not interested in playing a 1-3 province minor
Belgium or Poland or perhaps...Russia. I know I know big big country but it may be worth a shot though with tending a big nation with lot of macro and micro+ managing an interactive AAR it could be a nightmare for Thunderhawk.
(Sorry for the rare double post hehehe)