Doesn't it say "Work with your DM to determine the details of your discovery and its impact on the campaign"?what on earth does hermit's discovery do?
So the player is meant to work with the GM to work out what "unique and powerful discovery" the player has mind. I posted something similar back in 2014:
The existence of game elements like the Hermit background feature is why I don't agree with the suggestion, made by a couple of posters upthread, that in 5e D&D the GM has sole authority over the setting."Work with your DM to determine the details of your discovery and its impact on the campaign": this is about player authorship of campaign backstory. Even if your character shares the secret with all and sundry, it is still you the player, and not anyone else at the table, who got to make this a central part of the game.
That's different from getting food and drink or contacts, but it's a lot more than nothing.