I used to read them on my spare time between 2006-2016 or so, and read discussions about movies, actors and TV shows etc. Its where I got a lot of information on stuff, a lot of different opinions. Shit its where I heard about sad deaths like Judith Barsi and Brittany Murphy.
Its a shame they got rid of them. Since they did I almost never go on IMDB anymore.
Funny enough I never participated, I just lurked lol