So it is 9% and not 5%. "Justifying Infringers" as they were called in your link.

That 9% of people also included a group that believed they were justified but didn't actually buy a genuine product.

Yes. It is not truly 1:1, as in they probably don't necessarily buy everything they try for free and like, but at the same time were considered a group that spent enough money on the kinda of stuff they get for free... Thinking about the definition, I knew people like that, they were reading 10-20-40 manga per week, some just to see if they liked the content and some regularly, they mostly spent money buying Collector's edition of the stuff they loved but sometimes bought regular prints because the price was deemed good.