Theories on why IMDb message boards were closed (and wiped)

Honestly, I think giving each and every film, TV show, actor, and whatnot its own individual board may have been a mistake in hindsight. There are literally millions of each, which had thousands of people commenting on them all every day. That's a lot of a forum administration to keep an eye on and I get the feeling one of the reasons it closed is because they were overwhelmed. They could have probably just closed down the individual film boards, but left the main ones, and had been fine. But... they went the lazy route instead of trying to work something more manageable out with their user-base. I could have lived with going to one of the Genre boards or the Film General board to discuss things.