obviously they do not have 12 strikes, some sellers do not follow through.    I am assuming that you do have your blocks in place?   Saying all that, there might be legitimate reasons why some people lately won items and did not pay.  Remember floods, fires, storms, power outages lasting days, over this summer?  In this moment there are many people in Victoria on notice as more fires have broken containment lines.  While my friend in Townsville is talking about torrential rain with road closures. I think it is a good idea, when somebody does not pay, to have a look on map and see if there is anything happening/happened over past week in their area.

Given that you believe most sellers do the right thing  and don't leave negative positives but just open and close NPB disputes then the strikes are anonymous and do not appear on feedback

....... obviously they could have a zillion strikes because you are only apportioning and estimating your strike count on the negative positives that you can see and decided that some neg pos sellers did not follow through.... that is a flawed formula in my opinion but I guess it suits your argument