TO BE REVIEWED: What exactly is a Collibra DQ "instance" and how can I count them?

Question: What exactly is a Collibra DQ “instance” and how can I count them?
A: Yes, this is a massive point of confusion. In the Collibra DQ software there are the three main software components:

1. DQ Web UI (web application for end users).

2. DQ Agent(s) which are responsible for polling the DQ Metastore for DQ Check requests.

3. DQ Metastore (a database instance of PostgresDB). This holds the Collibra DQ state.

The Collibra DQ instance is associated with a unique DQ Metastore, since the WebUI is stateless, and the DQ Agents can access multiple different compute platforms.