they actually shut it down about a month ago, citing the following reasoning:

Hi @everyone. In order to better protect our community against future scams and fraudulent activity on Slack, we’ve made the decision to shut down this community channel indefinitely starting tomorrow, July 13, 2017. Please visit our website EOS.io for the latest updates and to find other ways to get in touch with us. It's unfortunate that it got to this point but we felt it was in the best interest of everyone.