Very good question, Chip. No short answers here...

For this reactivation feature, the links to the page where the consumer can adjust their card info is unique for every client and every consumer, since it passes subscription ID information to that page.
It is not a 'public page' to which you can send a consumer directly - each link is unique and is sent to the failed rebill consumer directly in the email. This is important that your failed rebill consumers use that link in the email, since it will activate another attempt at the rebill with the new credit card info.

Now, we do have another new feature that has not been as publicized, but consumers can adjust their subscription information on the main CCBill Consumer Support link, by entering subscription IDs or their credit card number and adjust their information on their subscriptions via the CCBill site. But this does not activate any rebill attempts.

So we have the main CCBill Consumer Portal for basic updates and the Rebill pages for the failed rebills.

Does that help?