there is plenty of discussion of churning chase credit cards... pretty sure bank of america as well.

there is only 1 post on chase business cards specifically, but i fail to see how you can claim that there is nothing about churning..

just recently there have been a number of posts explaining which cards people get how often... i really dont understand how you are not seeing this stuff on the forums..

search for churn and you will get an inordinate amount of hits.

also, different people do different things. there are not standards. that is what YMMV means. everyone has a system that they have made work for them. you can learn what they do, and then experiment and find what works for YOU.