Help: why my site has been removed from Bing's search results

I'm seeing the same thing here.

Just two days ago (link removed by moderator) was removed without warning, it still shows as being fine in Bing Webmaster Tools. It's been happily on Bing since Bing launched in what 2009?  Website was created in 2005, there's no ads, spam, dodgy links and I've never paid for dodgy backlinks or anything else dodge.

Also noticed my own blog has been de-listed too (link removed by moderator) most of the traffic on that literally comes from old Windows articles and how-to guides from when I used to be a Microsoft MVP.  Bing Webmaster Tools shows traffic almost stopping in October, and then it being de-indexed early February. It's been on the web for twenty years and Bing just kicks it off.

Neither of these are commercial sites so I'm not that bothered. But just imagine if these were commercial and 20% of my revenue just disappeared overnight?