Based on the introduction to his story, what made Damu Anna an exemplary devotee whose story was worth telling?

According to Chapter 25, Damu Anna's story is presented as an example of Sai's love for His devotees and how 'one-pointed faith' is rewarded. He is described as a 'great devotee' from Ahmednagar who was 'devoted to Sai's feet.' His exemplary status stems from his unwavering devotion, which was visibly expressed through his long-standing vow to provide a flag for the Ram Navami festival with 'uninterrupted love and devotion.' The text introduces his story to show how the 'Guru-Mother is an "Ocean of Mercy"' who wards off misfortunes and grants the desired objects of such faithful followers, as demonstrated when Damu Anna was blessed with sons.