I'd assume by contract she gets her percentage of royalties on anything based on the IP she created. .
Oh yes J.K.Rowling own words on Twitter after someone asked her: "how do you sleep at night knowing you have lost a whole audiance from buying your books." J.K:Rowling: "I read my most recent royalty cheques and find pain goes away pretty quickly."
I find that comment really lame asking like J. R. Rowling that and she is so rich that is hard to understand how rich. We are not talking about a few million net wealth in dollars, but it is unknown exactly how rich is J.R. Rowling.
It is not all I have not heard that that the game Hogwarts Legacy has Transgender stuff if anyone find such stuff please tell me that but no really not such stuff in that game. Well or have you heard that her books are full of Transgender stuff? No they do not have transgender stuff.
We already have LOTR TV Series that is totally garbage shit ruined in fact The One Ring TV serie is a disgrace to be released. LOTR movies were excellent.
Now Hogwarts Legacy sales are so high that there are not many games this year that can win that game in sales. Lets see example Diablo IV and BG3 how they do in sales vs Hogwarts Legacy? Even if they maybe would beat Hogwarts Legacy in sales fact remains this year Hogwarts Legacy very likely is among best 5 sales of games for year 2023 for sure! I have already bought BG3, but Hogwarts Legacy is absolutely on my buy list when it comes down in price a bit.
Diablo IV will I buy it? I wait for reviews if Diablo IV is pay to win game that is unknown. If Diablo IV is heavily pay to win game then perhaps I will not buy Diablo IV.
Of course thera are other big titles in 2023 example Company of Heroes 3 and Starfield and time will show how well they might sell.