Non paying bidders have definitely increased for me since the negative feedback for buyers was stopped. I hardly ever got a NPB before and now I am at the the stage where I expect it.

I am so sick of these type of people.  With the 4 days you have to wait to report them and then the other 4 to give them a chance to respond (which of course they don't) it takes 8 days before you can even re-list it.