Well, there's not much to talk about, it's just an exe that runs only the server, created with a use of pyinstaller and Python 3.X. I want to run pyblish-qml on different machines which have only Maya's Python 2.7 available, so I thought that distributing such exe and running it from the script that opens the pyblish gui would be the easiest way to achieve this. Alternatively, I guess, I'd have to install Python 3 on every one of them and then from the maya's python run the server in this other python before opening the gui in maya and that seems a lot more problematic.
Yes, you could do that; install on every machine
But what most people do, is install PyQt5 on a central location
And point their PYTHONPATHs to it
Or, store the entire Python 3 + PyQt5 centrally, and launch via that one