What has hope asked in return in "'Hope' is the thing with feathers"?

Hope never asks for anything for return, or as Emily Dickinson puts it, it "never-in Extremity/(. . .) asked a crumb of me." Using an extended metaphor, Dickinson imagines hope as a bird permanently perched in the human soul. It's always there, singing merrily away each and every day, in good times and bad.
Even during the hardest, coldest times of the speaker's life, hope never dies, and it gives her the strength to carry on. Hope has done so much for the speaker, and yet despite this, has never once asked for anything in return. This emphasizes the nature of hope as a gift, something that is freely given to us, something taken by each and every one of us without our needing to give anything back.
https://www.poetryfoundation.org/poems/42889/hope-is-the-thing-with-feathers-314