Not sure where you get your information, but her site is definitely not NON-NUDE. She does a bunch of tease, and especially for stills, but her cam shows are not NON-NUDE.
Stills and vids: basically non nude. Occasional frontal wedgies, the top of her slit, or the edge of a nipple. Lots of bottomless stuff where you can just barely see a bit of her lips.
Members camshows and zipsets: Much like above but with lots more slips. You could still call it non-nude, it just depends on your definition.
Private one-on-one chats (which you can obtain by either a) paying a lot of money or b) spending a lot of time hunting down recordings): Like a gynecological exam.
Have I got that right?
So calling her non-nude just depends on your point of view, but complaining about her not showing anything is just dumb. Fork over the money or work harder to find the stuff. You want to see Nikki naked, you've got the Jerry Springer appearance and that's it. Big difference.
You can't really blame someone for supposing that the white spots aren't in the members' pics. It's pretty unusual for a site to do that.