It still gives "No hunger, no thirst" miracle without a failure and endlessly. Also Firun is supposed to be highly ignorant to pleas of mortals and he is primarily god of winter and hunting. Perhaps increasing your hunting chances/events or having a less troublesome winter(for one month or week maybe) by a successfull miracle could make more sense. Of course it should not be easy for him to respond to pleas. Currently the miracle looks like very Travia.