The Count is a system for collecting data related to events that happen on The Exchange. For example, page views, playback of audio, etc.
This is deployed as an AWS Lambda function as an endpoint of an API Gateway. Requests are made to that endpoint to record events. For example:
example.com/action.gif?event=view
Events are recoded to a Kinesis data stream.
A second Lambda function is triggered by that Kinesis data stream. It reads event data in batches, and writes them out, one event per line, to text files in a file system intended to be processed by The Castle.