You're right that it's not just "what we do" but "how we do it" that matters for Gittip. For me they're actually related, though I guess I haven't convinced everyone of that. Basically I just don't feel grateful and generous when I'm spending most of my time working for a paycheck. I want to give my labor away for free! I want open work!
I wrote a post about "open products" for The Changelog a while ago that talks about the question of consumer-facing products that also happen to be OSS: http://thechangelog.com/open-products/.