it will track the action when the user "confirms" the registration... doesn't that work?

No, that doesn't seem to work. Just to confirm we have the option "new user account activation" is set to "self" so the user clicks on a link in an email to confirm. Is this the action you would expect to be tracked? Is there any other dependency/configuration option you expect to have set for this to work?

It's a very old thread, I know, but is it solved?
I've got exactly the same situation. Activation via E-Mail link. Plugin is set to "register new registrations" = yes.
Table #__content_statistics has no records for component='com_comprofiler' and type=3. Login/logout (type 4/5) works fine.
Maybe this hint is important: when working with cb you usually disable joomla user registration function. So am I. Just cb handles the registration process.
Thanks,
Michael

Thanks for answer and offered help. My test environment is a copy of the production environment and includes money account information and personal data.
Therefore, I must not grant access to someone else.
I will have a deeper look at your code and CB's trigger. If I find thomething out I will post it here. If not, I will try to prepare an environment and give you access to it.

Thanks,
Michael