That my particular post is removed, is no problem at all. I should better made a PM to the regarding members.
But now anything is clear to me. Some photographer who shot hunderds of pics in Croatia sold almost all of his pics to Purenudism/Nudismprovider besides that he uploaded some of the same pics to Coccozella and let these pictures themselves circulate. The problem with Purenudism/Nudismprovider pics is, is that they don't have a watermark in the picture itself but have a copyrights bar/sentence under the pic. If someone downloads a picture in the highest resolution and cropped out this bar/sentence, it's very difficult to determine if this is the original non watermarked/copyrighted pic or a copyrighted version. In this case it acts fortunately to 'original' pics.
I also had a membership in the past of Purenudism for a few month's and a membership in a few other months to Coccozella, thats why i recognized some of these pics and had some unjustified concerns.