This doesn't block you from visiting MSN, but it does stop their articles from appearing in search. The reason is that MSN just re-hosts articles from other sites rather than provide anything of value. MSN posts often outrank their original source because Microsoft is pushing it hard on Windows/Bing/Edge.

For example: https://www.msn.com/en-us/movies/news/jodie-foster-heckled-a... is just a re-hosted version https://www.independent.co.uk/arts-entertainment/tv/news/jod...

My hope in hiding MSN is to allow the original sources to rise back up to the top.