Even if they want to do it, can they? The Wikipedia article claims that every piece of software necessary to run the service would have to be licensed as SSPL. Not just to have its source code released in compliance with whatever other copyleft or permissive license it was under, but relicensed as SSPL. That means (assuming the Wikipedia article is accurate, anyway) you can’t even run it on top of Linux and be in compliance with the license! You’d have to write your SSPL service for the bare metal hardware, or write an entire new SSPL-licensed OS for it.