I don't know if you aware about it, but seo software and tools are using free api that allows them to review search results and page ranking. starting from August 1st Bing will block all the free api's and start to charge crazy sum of money for it, so it wont be worthwhile for the tools/soft. to provide the service. this will be a nice test for the soft./tools companies professionalism ....
The new Azure Bing Search is horrible. The documentation is even worse. It was a great system and I wouldn't mind paying 40.00 per month if it were the old system but they ruined the search api. It makes no sense, they had great samples and full documentation for the free version, now they charge and only have a word document "migration guide" which has contents that is completely incorrect. They are not going to make any money with that service other than people that signed up and forgot to cancel their subscription.
First google getting rid of their shopping search now bing is screwing up their APIs. What's with the search engines this summer. I will not be paying because bing doesn't deserve the money. They had perfectly good free APIs that they are basically tossing into the garbage in an attempt to make money.