Meaning of churn

Hi, guys, could you help me out with a phrase i've stumbled upon - "he treated it like it was only a part of his churn". It means that it was no big deal? Am I right?

Churning means trading a customer's securities just to earn commissions. From Random House Historical Dictionary of American Slang, Volume 1, A-G by J.E. Lighter, Random House, New York, 1994. It means the same thing in the insurance industry.

It probably evolved to mean it's all part of his game.

Thank you so much for your help!!