CCM Membership is free and all you got to do is to respect the Charter to use the forum: no insults, compliance, etc ... CCM does not divuldge your addresses to third party: your mailbox will not be flooded with advertisements. Being a member allows several features such as better monitoring of your post, the use of private messaging, the possibility give its opinion on any particular hardware or software ... and many others.
Registration is very simple and runs in 2 steps:
Just fill out the form and validate (picture below)
Connect to your email address(indicated in the registration form).
Open the mail from CCM and click the registration confirmation.
To login, enter your username and password at the top right of the window.