Yes, hence the quotation marks in “market”. But Microsoft is a company large enough to have an internal “market” for different departments and there is also the outward pressure from Mirosoft’s shareholders for whom the cloud business in the main driver of profits/stock value.

Edit: Maybe to make it more clear: Yes there are no advertisers as in the classical “enshittification” model, but Github is subject to similar outside pressures that do not prioritize the needs of the Github users and thus a very similar dynamic enfolds.