[cassianoleal]

I was talking about Microsoft being an offender in general, not necessarily anything specific to this deal.

That said, each new datapoint a large data broker like Microsoft gets adds that much more to their ability to deanonymise you, regardless of whether you're logged in to any of their services or not. This can happen more directly (e.g. shared, long-lived cookies), or indirectly via techniques like fingerprinting.