Regardless of Trello's pricing plan, I think you should and have the opportunity to charge. 1) even though everyone on HN seems to, not everyone in the world k

Regardless of Trello's pricing plan, I think you should and have the opportunity to charge. 1) even though everyone on HN seems to, not everyone in the world knows about Trello. 2) Trello isn't your only competitor. The most popular online project management tool in the traditional, offline world is probably Basecamp. They charge (and make a killing). 3) many people who do know about Trello don't want to use it for one reason or another. Before today the biggest reason I saw was their lack of a monetization strategy, but there are still likely a good number of folks on HN who want something similar but aren't satisfied with Trello. One potential route for you to take, that I've noticed any time Trello comes up here, is to offer customers installation of ThetaBoard on their own servers.