thing is they can team with people that probably have that data already. Say Microsoft switches teams to a hypothetical SamCo AI most of the internet has already been indexed by bing and wants to be indexed by bing as its the number 2 search engine. that mean they either have cached or access to pretty much everything SamCo could want to feed said AI. Reddit or Twitter for example would never cut bing off as it would cut off users. Microsoft could though block openai from further access to things like github linkedin.