  Cloud providers typically charge for their services. There are diverse
pricing models which often follow a pay-per-use paradigm. The consumers'
payments are expected to cover all cost which incurs to the provider for
processing, storage, bandwidth, data centre operation and engineering efforts,
among others. In contrast, the consumer management interfaces are free of
charge as they are expected to cause only a minority of the load compared to
the actual computing services. With new service models and more complex and
powerful management abilities, it is time to rethink this decision. The paper
shows how to exploit the control plane of AWS Lambda to implement stateful
services practically for free and under some circumstances even guaranteed for
free which if widely deployed would cause a monetary loss for the provider. It
also elaborates on the consistency model for AWS Lambda.
