well, your point is too... silly, because the "devs" could never leave nutaki WITH FGK, because it's not their game, it's nutakus

nevertheless if nutaku would offer a free version on steam, with less content, you have to think about it, the daily changes of stages, the allie-system, i don't know if that could be implemented so easy on steam.
but the free and limited version on steam could ppl convince to look for the "real" and uncensored (or sfw) version on nutaku.