My bing traffic has been pretty consistent and changed little over the years. However, as of October 2nd this year I am seeing a sharp decline. I checked the keywords for which I ranked well on Bing, and sure enough I lost many of them. It looks like Bing went in G's footsteps and now favors big sites at the expense of smaller blogs.
On some sites (such as searchengineland) it is claimed that this phenomenon started happening in July this year and is due to Bing swtiching its search over to HTTPS, so that a lot of Bing searches now appear as Bing referrals in GA. However, I do not see that in my GA, and for me the decline started only since Oct 2nd, not since July.
I also see my Yahoo and DDG traffic declining since Oct 2nd in a similar fashion, which is no wonder because they depend on Bing's results.
Have you seen any decline in Bing traffic for your sites lately?