According to the text, for whose benefit did Sai Baba appear in Shirdi and ultimately merge into the unmanifest?

The text makes it clear that Sai Baba's actions were entirely for the sake of his devotees. Chapter 43 explains that he appeared in Shirdi, 'gathered by the past merits of devotees,' with the specific purpose of their protection. His so-called death is described as a conscious choice made only after 'the task for the devotees is over.' Even after merging into the unmanifest, he is said to have stayed in the hearts of the devotees and continues to 'always keep the devotees awake.' His entire existence, from manifestation to merging back into the unmanifest, was a play for their salvation and welfare.