Bing is a search engine.
Lack of subject-specific blocking
As of January 2018, Bing did not appear to be blocking ISGP for the search term "Dutroux affair", presenting an ISGP page as the #2 hit on this search term. By contrast, neither Google not StartPage returned any hits from the ISGP site in their top 100.
Wikispooks was #1 for the search term "7th floor group" in January 2018 (as it was for Ask.com, Ecosia, Yandex and Yahoo), in contrast to DuckDuckGo, which listed it at #30, and Baidu, which didn't include the site in the top #30.