Current alpha release is not stable. Contact us to stay in the loop.
We are planning to charge a fraction of a cent per instance per hour. You, the designer, can switch on and off instances as you please, and will only be billed the time they are switched on. Your client pays you a monthly hosting fee that is (should be...) much higher. This accounts for the first-line support that you give them regarding their website. Of course, we’re here for second line support.