The problem is due to an update change in the server software which is affecting the sign-up links. It is NOT a data breach!
We do not store any personal data on our site. All payments and financial transactions are handled directly through PayPal (which accepts all credit cards) -- and PayPal only communicates to our website that someone has paid. It does NOT provide any credit card or private details.
So, until the issue is corrected -- simply email us directly and we will enter your subscription manually, along with providing you with a secure link to PayPal.