simple answer: because people who have access on the build were not allowed to leak the ISO. Is it difficult to understand?
LOL Its called a "leak" for a reason, if they were allowed to leak it, it would be called a "Release"
Thanks for the clarification. Because of that you will have a gift from me.. An ISO of WCP fresh from MS Server..
haha! not bad! Ok, there is no Leaker more, this is the reason. haha I hope of a Final Ultimate with a better UI
Release Candidate is the last stop on the way to RTM... Consumer Preview is the second last stop! Lol!