Indeed, we do have plans to support nosql in the next few months. Our Pricing for nosql will be really different and a lot lower for the storage. We started with relational db first because a lot of developers have existing skills with RDB and it was requested by ALL our beta testers.

Our platform is a fully automated system with high availability & zero maintenance required. So you don't have to setup a RDS box + front end server for the api + load balancer + .... maintain / update all that stack.

And YES, we are very flexible and open to suggestions related to our pricing This is also why we posted here, to get valuable suggestions and comments :)