If you have you have ever registered on the website you automatically get a Free account (all the normal content) so need to do nothing. Over 400 people including most forum users had registered already, but the Forum registration may also get access as the system is supposed to be 'bridged'.
Anyway, I have now managed to fix the access controls and user status so that no-one had to register to see the existing content. We may have some content which asks people to register with a Free account (this lasts for three years), and we will have other content that may include eBooks, which requires the $10 a year Normal level membership.
I have just completed reworking the system, but I do not yet know if it's all 100% correctly working.