Is his cooking gonna be accepted by Paris after foodtesting 3 times?
Yes
What's the benefits on doing this this tho?
It's worth it. Exspecially if Axel likes you. You get to make a very special dish the gives 5 LvL point (= 1 statpoint) + other things,
can't find any volunteers after the first foodtesting.
My Explanation is rock solid. Ask Snow always first, then Chet. If Axel does not like you enough (you Monster!) ; you need to eat one of the dishes yourself, that comes with a penelty.