TL;DR: discover if discuss.openai.com is temporary or permanent disabled; if the second case, look for some official explanation
The https://discuss.openai.com/ is (or was) one of the places open on the internet to discuss philosophy and A/IS ethics.
I remember that people around the world were discussing topics that were not just about how to develop AI, but about morality, risks, impact, etc, in one of the sub forums. And some of these threads where big.
At this moment, the adress "discuss.openai.com" does not resolve to a IP address. I tested from different IPs and proxies, and still not able to connect.
Looking from cached pages of the site, I'm able to find that at least until 2018-12-23 the discuss.openai.com was online.