Postgres is an good example of doing this right IMHO: http://www.postgres.com the commercial aspects are underplayed and yet they have a good business. With Postgres I feel I can contribute even if I am not part of the "core." I think Clojure and the businesses around it benefit from keeping the same open, welcoming feeling.
I have been very interested in Clojure and haven't seen it put a foot wrong so far. This is an unexpected "off" note.
EDIT: Languages and tools do prosper and my point here is to highlight how they do so by building a community and what Clojure's "core" risk through making this distinction.
EDIT: I know about http://clojure.org - my point is that http://postgres.com (note the .com) downplays the us-vs-them-ness that comes with a commercial tombstone site. Also the announced redirect indicates to me the change in tone is intentional - I hope they readjust. They can keep the community-sense and still have a good business.