Exactly. It's not even a matter of "was built with." How about "is being built with?" If they had to pay for all the stuff they use now then for all I know it w

Exactly. It's not even a matter of "was built with." How about "is being built with?" If they had to pay for all the stuff they use now then for all I know it would have a big impact on their financial position. More importantly they might not exist at all if they had to scrounge up six figures a year for their first commercial database license. As I said in my response to Axelrod on Medium: open source drops the paywalls around production quality "parts" so that big ideas, which have a big impact on the world, can flourish.