How do leaks affect both the audience and the creators?

Recently some of The Last Of US II plot and gameplay leaked; a few months ago some elements of the new Star Wars The Rise Of Skywalker were released on the internet before the movie itself; and about a year ago, Game Of Thrones major plot’s elements of the last season were revealed before it aired. How could those leaks have affected or could affect the audience (or the gamer community), whether it is on its viewing (gaming) experience or on the decision to pay to see the movie/the tv show (or buy the game)? What do the reactions following such leaks may reveal about the ‘dark side’ of some fandom? And, on the other hand, how the risk of leaks impacts on the creators' work? How those new threats are taken into consideration by directors, filmmakers, producers, etc.? How are they, then, received by the audience?