Looks like the 2nd page in that discussion was overlooked. I've included here:
Nate K Rapid Response Team wrote:
Ohiojude,
Thanks again for your post. I would like to apologize as I misspoke in my first post to you. You are now able to register Dealer Roadside Assistance memberships on www.GoodSamRoadside.com. This is a change from in the past that I was not made aware of until now. I have been in contact with our IT department in regards to the problems you had with your account, and they have fixed whatever it was on the back end of things that was preventing you from registering. You should now be able to register your membership without any further issues. Once again, I apologize for the miscommunication, as I was personally unaware. Please let me know if you have any further questions.
Nate K.
Marcus' Rapid Response Team
As you can see, the answer was given, the problem fixed.