The reason for Camram’s original implementation was as a reference implementation for a sender compute system, namely Hashcash. Although this is still a large part of the goal, Camram has tight integration with the CRM114 spam classifier. It also contains a graphical user interface to manage itself and the CRM114 application as well. Camram is worth implementing just for the ease of use it provides in managing CRM114.
Camram can be set up as an invisible proxy between your existing MTA and email systems that want to send your users email. This eliminates the need to run Camram on your existing (perhaps overly loaded) email systems. Camram refers to this setup as the interception method.
You should be aware that Camram is still a work ...