Her success is 'just reward for' her hard work. [=she deserves her success because of her hard work]
She is 'reaping the rewards' of success. [=is getting all the good things that come with success]
The police are offering a 'reward for' information leading to the capture of the fugitive.
(..) DAENERYS: I'll have to make some changes in the Citadel when I take my throne. A great service merits a great reward. SAMWELL: Oh, it's my honor to serve you, Your Grace. DAENERYS: Well, there must be something I could give you. If it's not too much trouble, (..)2019 TvShow: Game of Thrones Title: Winterfell Season: 8 Episode 1