Microsoft owns it. I honestly can not imagine trying to build a business on an API owned by Microsoft of all companies.
Microsoft seems like one of the more reliable partners to build on compared to Google etc. just for the simple reason that their customers are large businesses and not breaking things for them is in their blood. Just like Windows backwards compatibility.
Though my investment will be still tiny at the moment, but not other multi-modal model on the market right is as good.
What exactly are you saying?