I believe the general category of antitrust is "tying agreements" where you tie a weaker market share product to a stronger one.

Also, I'm not arguing why it's okay, just that it's a normal part of antitrust law and not specific to the EU. The US FTC has an example on this page: https://www.ftc.gov/advice-guidance/competition-guidance/gui...

How do EU fines subsidise EU businesses?

https://competition-policy.ec.europa.eu/index/fines_en :

> Fines imposed on undertakings found in breach of EU antitrust rules are paid into the general EU budget. This money is not earmarked for particular expenses, but Member States' contributions to the EU budget for the following year are reduced accordingly. The fines therefore help to finance the EU and reduce the burden for taxpayers.

Nobody would use Teams over Slack (especially from 2019-2022) if it wasn't part of O365.

My company switched us off of it and it sucked. But it was included in our E5 licenses :)