This sounds very interesting, but since it is a SaaS model and you are relying on their infrastructure, what exactly are they looking at as their business model

This sounds very interesting, but since it is a SaaS model and you are relying on their infrastructure, what exactly are they looking at as their business model? Freemium? Any idea of pricing? It is something I could use in an app I'm working on right now, but I'm just building a simple free tool and would be interested what their plan is for the service before I get myself tied to it.