On Redhat/CentOS how many use a repository and how many build from source?

[francis picabia]

This is the amavis mailing list and everyone is more willing to chip in about
Redhat and Postfix than answer a question about how you prefer
to manage amavis as a package or building from source, etc.

I'm going to assume all Redhat users are using rpmforge and it
is kept current for security updates, even though it looks to
be from May 2011 when using the last update from their repo and yum.