I was able to get the Annual Fee Waived offer but it required also logging into my chase account. First, sign into chase, then go to united.com (same window), sign in to united.com (view an itinerary to make sure it's really signed in, sometimes cookies leave you in this not quite signed in state), then paste the URL from this thread. Now it will take you to the explorer card member site. Paste the URL from this thread again and it should take you to the fee waived club card page.
I applied, but of course I'm going to have to go through the reconsideration line, two or three too many chase cards...
christian