Has Bing Blocked the whole dam niche? (Diet)

N/M. No one seems to be open to finding ways around this, deleted.

Yes, as of 10 days ago, the big B has banned many niches, such as diet, skin, make money, etc.
BUT BUT BUT, the big B is NOT saying this officially.
It is just like the big A has banned tech support in end of 2013, but does not say this officially.
However a few people (like me) are able to get such ads running.
Are interested in a "no upfront payment" trial with me

My site is still there, I didn't figure the mentioned issue over there.

I guess you have been running your ad(s) before the recent B hammer : such ads from B accounts are not (yet) affected.
What is your niche ? If it a big B sensitive niche and you run the same ad, same keywords, same LP from a new B account, it may get banned.