The Ashley Madison story is mainly about a website that was designed for extramarital affairs. It promised anonymity to its users. However, it faced a major data breach in 2015. This exposed the personal information of millions of users, causing a huge scandal. Many people's reputations were damaged, and there were legal and ethical issues that ensued.
If Madison Bell is a relatively unknown individual, without additional information like her field of work (whether she's an artist, an athlete, etc.), her location, or any particular events associated with her, it's very difficult to determine the real story. There might be a Madison Bell in a local community known for a specific achievement, or it could be a name that's more personal and not widely publicized.
Madison Montgomery is a character in American Horror Story. She is a witch with a lot of power and a very flamboyant personality. She often gets involved in the various dark and mysterious events that take place in the different seasons of the show.
I'm not sure specifically who 'Katy Madison' is within the context of Fantastic Fiction. There could be many characters or authors with that name. It might be a relatively unknown or new addition to the Fantastic Fiction world.
I'm not sure specifically as there could be many different 'Madison game stories'. It might be about a character named Madison in a game. Maybe it's an adventure story where Madison has to overcome various challenges in a virtual world.