So in essence, this doesn't affect anyone except for SaaS platforms that are attempting to release their own products while heavily using Unity's engine within them. Which 100% makes sense. You're building your company based off of someone else's commercial product... You need a specific license for this. GG Improbable

Reading between the lines, it sounds like they only want the game developer to be running Unity on the server, not any other third party. Does this create an opportunity for a professional services outfit to provide maintenance and support for running cloud servers rented by the game developer? Can I put an AMI up in the AWS marketplace and charge for it?

That's what their PR people say, but that isn't what their terms and conditions actually do say... "2.4 Streaming and Cloud Gaming Restrictions. You may not directly or indirectly distribute the Unity Software, including the runtime portion of the Unity Software (the 'Unity Runtime'), or your Project Content (if it incorporates the Unity Runtime) by means of streaming or broadcasting so that any portion of the Unity Software is primarily executed on or simulated by the cloud or a remote server and transmitted over the Internet or other network to end user devices without a separate license or authorization from Unity..."