API pricing requires striking a tricky balance between the needs of developers and the cost/profitability of the provider. I am on the boards of several companies that provide APIs as their primary business model, including Twilio, Dwolla and Sift Science and have been in long discussions about the relative merits of pure usage-based pay versus some type of bundle pricing (sometimes also referred to as t-shirt pricing). This morning Ziggeo which provides video recording, storage and playback ...