They allowed him to keep the extra money as a gesture of 'goodwill'.
a 'goodwill' ambassador on a 'goodwill' tour/mission
She has/feels 'goodwill' toward all her coworkers.
(..) the North is yours. Littlefinger: I delivered his bones myself. Presented them to Lady Catelyn as a gesture of goodwill from Tyrion Lannister. Seems like a lifetime ago. Do give Lord Tyrion my best when you see him. (..)2017 TvShow: Game of Thrones Title: Stormborn Season: 7 Episode 2