Saw this, I was wondering what they mean by PSQL Cluster where they need 70(!) instances. Is this just replication or also sharding of some kind? Also, everyon

Saw this, I was wondering what they mean by PSQL Cluster where they need 70(!) instances. Is this just replication or also sharding of some kind? Also, everyone always talks about instance cost first, but consider this: 100-120gb Internet egress per minute comes out at another $200k-$300k per month.