Frying would make sense for Madras types, and brands like Dholakia Sparrow, which seem to resemble Irish toasts in their own unique way. Perhaps one of our resident Indian snuff manufacturers could shed some insight on this. However, I believe at least the larger companies have transitioned away from ghee towards longer lasting mineral oils (I think both 6 Photo and Dholakia mentioned this here before). Ghee might still be common among the smaller brands, which would include most of the Madras styles.