It's not clear at all. It's very hard to figure out from datapoints, because 4/24 is easy approval, while 6/24 is certain death, but 5/24 (without factoring in business cards) is YMMV (some people get approved while others get denied for "5/24" reasons).

So to be a valid datapoint, we would need someone who applied for at least 2 business cards from Chase in the past 2 years, and is at exactly 4/24 if those are not counted, but is at 6/24 or higher if those are counted. That is the only kind of datapoint which would start to "prove" it one way or the other (but if this too is YMMV, one or datapoints may not be enough for "proof" that it "always works" or "always fails"). But at least it would be a start. But in the "applying for Chase cards" thread we're still waiting for the first datapoints of this sort. (Some people in that thread hope to be able to provide such datapoints in the coming months.)

So I would say that if you want to be as safe as possible, assume that biz cards from Chase might count toward 5/24 until and unless perhaps you start hearing of "hard proof" that they don't count (at least for some people).

For someone "risk averse", I would suggest focusing on business cards from banks other than Chase (for the reason above) and other than Cap One (because it does report to credit bureaus). That still leaves you Amex, Barclay, BofA, Citi, and US Bank, among others.