For context, it is theorized that Chimata is Kamuōichihime, who would also be another sister along with the well-known Konohanasakuyahime and Iwanagahime. 🤔 Though do keep in mind that the line is really thin, with most of the foundation being just the fact that Chimata is an ichigami.
A "market god" is not something exclusive to Kamuōichihime. There are a lot of kamis who are also ichigami – famous names like Daikoku-sama revered by the Earth Rabbits, Ebisu, Inari, Jizō... Despite that, however, I still hold my candle for the theory. I do love the prospect that both of Sakuya's older sisters have revealed themselves in Gensōkyō.
Another thing would be the Hare and Ke. Fan translations seem to have gone with Chimata being a "god of revelry", which I personally think it's a bit off. Hare and Ke are specific concepts in Japanese – the special and the mundane. Hence, I believe transliterating it like Yin and Yang would be more appropriate.