Hi please see the design doc for more inspiration as to why we built it: https://docs.google.com/document/d/11tjK_lvp1-SVsFZjgOTr1vV3...

We're soon coming out with a blog post explaining the motivations and architecture in detail. But yes, the pricing is one of the motivations to build this, and as logs will be stored in S3 or an object store, the cost will several orders of magnitudes less.