Not to be annoying, but Manufactured Spending has very little to do with Credit Card Churning. One can credit card churn with 0 manufactured spending, it's an entirely different entity.

"Question: Who should be posting in the Manufactured Spending Forum?

Answer: All Flyertalk members are welcome and encouraged to post any and all strategies, ideas and promotions pertaining to earning airline miles or points through strategic spending. "

"strategic spending" as a strategy has nothing to do with whether or not credit cards award repeat bonuses (churning)