Content Lock is a Community Builder content locking plugin that allows you
to lock content on an article page for only registered users to view it. It
will also allow you to add a field to the users profile that takes points away
from them for viewing said content.
Very simple usage allows you to lock content and choose how many points to
remove from the CB profile field every time a user views the said content. This
allows you to sell points to see content on your site. Then just create a CB
field to hold each users points. Great for subscription sites.
To view the documentation on this software click here