If you know anyone that use https://duckduckgo.com/ or https://www.searx.me/, then you know some people who use Bing (at least indirectly). Also, some people use Bing (directly) to find porn, apparently...
Ah, yes, I too use Bing to search for images of a specific nature with some frequency. It's quite likely the best search engine available for the... higher arts.
I do not know if they have done it on purpose, but kudos to the Bing team either way.
I use duckduckgo which is bing with a skin and added features. One of those features is "bang commands" which allows you to use a single site to search thousands of other sites individually. If I want to check if my local Home Depot has the particular deck screws I need, adding !homedepot to my duckduckgo query redirects me to Home Depot's search results page. This is very useful as web sites become heavier and heavier which results in a terrible experience just getting to a search box. Ditto Amazon and most other ecommerce sites. Plus it is nice if I don't get the results I am looking for on duckduckgo to just add !g to the query and get redirected to Google's results.
It gets about 21% of the search market.