Literally everything I have found here has been stolen directly from BGG - game descriptions, images, game stats, everything. Even if BGG gave permission for its "wiki" content (which it hasn't), the images are still owned by the people that took the pictures. I know numerous photos of mine are on this site and they do not have my permission to use them.
The blanket disclaimer at the bottom of this site is not legally sufficient either (and it doesn't even mention BGG anyways). If you are going to take copyrighted content from another source, you need to attribute that source explicitly when it is used, not a random blanket disclaimer claiming it came from one of any number of sources.