Neither Surprising nor Revealing.
If Microsoft are doing this, Google either are doing it too or have already done it – perhaps even already rejected the possibilities. Microsoft are certainly not breaking new ground.
Whatever the case, however, none of the actors in the Search-space are doing it in order to improve their Search offerings and thus regain market share.
Their motives will be profit – one way or another – and, sadly, the utility-value of Search is not measured in Shannon Information.
The answers-to-queries ratio is almost anathema to these companies and their exploitation will not change that. We should not expect or even hope for a return to the golden-days of freely accessible, online answers to our questions.
Simultaneously, we should be starting to realise that just expecting our own stake-holders to "search for it" is not reasonable any more, and design our own products and references and documentation and code-libraries and lookup-tables to reflect the fact that our users, too, are deprived of useful search engines. When you next read a nice, ergonomic, friendly-faced, human-language error message in your terminal and know, for certain, that THAT will be useless – even quoted – to search, yearn for those good, old-fashioned codes and numbers and appendices full of tables, from the past.