Sacrifice fragment question

so I read that one Sacrifice fragment adds 5% increased item quantity to the map. Do they stack if I add more than one? What else does this fragment add to the map?

the fragment doesnt add anything else to the map, just 5% increased quantity.

you can use 3 (or 4 if you have the expanded map device) along with a map, for up to +20% increased quantity.

however, they must all be DIFFERENT fragments. you cannot use 3 'sacrifice at noon'.

Got it. is it worth using sacrifice then? I don't see what other good uses for them.