"The smallest pledge each month really does help our small team keep churning out the content."
I don't think that is what you meant to say. "Churn" is not a good thing in a business. It usually refers to customers that stop doing business with you and move over to your competition.
Investment brokers also use to describe how they manipulate customer portfolios to generate sales commissions. As in "I made $10,000 last month just by churning my clients' accounts.
Edited to add: perhaps this is a difference in how words are used on our respective sides of the pond. All the more reason to make sure you're using the words you want to be using.
In manufacturing it is taken to mean producing vast amounts of low quality goods.
As a writer I'm tuned into using words with care. I'm surprised that some one trying to use words to make a living isn't more careful about how he uses them. Perhaps its my education in English literature and accounting combined with twenty-five years or so in the business world.