Or how about OnVelocity? They provide a source code repository and have hosted version.
Or SugarCMS ?
Or couchdb with couchbase?
It seems to me that there are plenty of Saas companies that share their products as open source.
SugarCRM venture round http://www.sugarcrm.com/about/sugarcrm-investors
CouchBase venture round http://www.venturecapitalupdate.com/funding/08/16/couchbase-...
If you raise tens of millions of dollars you can put off the need to become profitable for quite some time ;<).
"Indeed. That's never been in dispute."