It depends on the ability and needs of the receiver.
If the one person is responsible for distributing charity and is known to be good at it, then it may be better to give the $100 to 1 person.
That is passing on the responsibility to another but at these times, that is a more common distribution method.
But generally, $1 to 100 people is preferable. It may lack the “wow” factor but as needs differ, for one person that $1 may be throwaway but to another it’s what they need to feed their family or accomplish some necessary and good purpose.