It's not a negotiation tactic. It is a joke because the numbers they are talking about are a joke. He's saying that if they think Apollo is can make Reddit 20

It's not a negotiation tactic. It is a joke because the numbers they are talking about are a joke. He's saying that if they think Apollo is can make Reddit 20 million a year then just pay him 10 million and they can keep the change. The truth is both sides know these numbers are b*llsh*t.