Interacting with the Begger during the 10-minute interval results in a short line of text thanking the player.
After you donate to the Begger when he asks for 50 , he will later present you with a Cursed Scroll for Armor Defense (60%) upon interacting with him again after the time interval. He claims it is a 'useless piece of paper' and has no use for it, and gives it to you for your kindness to him. "Begger" is actually spelled like beggar in real life but the in game NPC is spelled like "Begger".
After accepting the cursed scroll, you can no longer donate to him.