re Inventory: we want to provide live product availability information to the developer through our API. We encourage app developers to GET latest product info

re Inventory: we want to provide live product availability information to the developer through our API. We encourage app developers to GET latest product info from our API before even rendering a potential Buy Now button. To make that possible we keep product information extra-fresh from big retailers, and even update it on the fly when we see orders failing because the product is out of stock. re Payments/Processor: So that's where it gets interesting. We have constructed for Pinterest a full payment distribution infrastructure to send payment information securely to large retailers or their processors. This infrastructure will also be used by Relay. Doing so, we believe we bring a ton of value to the ecosystem. But I'm sure you agree with that given your focus!