Hello,
PrivacyWall is a new one to me.
Me too. I don't know from where they get their index, it might look like Bing, but it's different, may be they customize the results, with others sources, or their own criteria.
The Preview View mode, is interesting. They download the page and content themselves, apparently, from an Amazon IP, and produce an "image" of the page, stripping all third part code. So, it's a preview. You can read it, but not click or copy text. So it sounds like they tried to find a compromise , and not be accused of stealing visitors.
However this preview mode nearly never works. It doesn't with my sites, because I block DataCenter 's IP, and it doesn't work with Facebook, etc...
As for design, it's copy of Google's page layout and colors, with ads on top of the SERP which are not really different from the organic results (no icon, AD mention, and no privacy preview).
I still prefer DDG. I just wish DDG get its own crawler and build their own database.
