That "no training or setup, tons of free users" model? You can't sell into the enterprise like that. And Trello can be very useful in the enterprise - into an e

That "no training or setup, tons of free users" model? You can't sell into the enterprise like that. And Trello can be very useful in the enterprise - into an environment that doesn't really think twice about paying $1000/year/user. Enterprise is a far more lucrative market than freemium. And if you need to keep doubling your revenue on a regular basis, that's how you get it. Don't let the SaaS thing fool you about sales. Salesforce is SaaS too, but they're a lot more like Atlassian than Google, business-wise.