Quite honestly, I'm surprised it has taken this long to come out. Or has it always been out? I know it was somewhat of a joke, but I'm 47 and as long as I've been old enough to know what it means, "Casting Couch" has been a phrase I've always heard. I think the issue is that Hollywood was always a "Boys Club" in the fact that they always have seemed to protect their own, no matter what the issues. Hiding gay actors and actresses, actors who were still willing to work with Roman Polanski after he fled the country, etc.
Don't get me wrong, I'm not trying to associate being gay with what Polanski or Weinstein did, just used it as an example to show how tight of a leash hollywood actually has had on information. The saddest part of all of this, is none of it surprises me. It's just something I always assumed was going on anyways and the Powers that be in hollywood were OK with it and the Actors and Actresses were willing to bend their morality for the ability to work in a profession they desperately wanted. And that's the biggest problem, the allure of stardom is so great for some, they are easily taken advantage of by those with the power to make or break a career.