Disqus seems to have gone to shitter
Email notification links not working
Clicks from new comment notifications not taking me to the comment, but instead Disqus homepage (?!):
Signing in is not working
Privacy issues
The notification links seem to track my clicks:
Twitter login requests too many privileges:
Summary
All systems have problems from time to time, but the amount of issues indicate a systemic problem. Disqus is garbage.