https://en.wikipedia.org/wiki/Criticism_of_Microsoft
Ignoring unauthorized copying
… Bill Gates said “And as long as they’re going to steal it, we want them to steal ours. They’ll get sort of addicted, and then we’ll somehow figure out how to collect sometime in the next decade.”
The practice allowed Microsoft to gain some dominance over the Chinese market and only then taking measures against unauthorized copies. In 2008, by means of the Windows update mechanism, a verification program called “Windows Genuine Advantage” (WGA) was downloaded and installed. When WGA detects that the copy of Windows is not genuine, it periodically turns the user’s screen black. This behavior angered users and generated complaints in China with a lawyer stating that “Microsoft uses its monopoly to bundle its updates with the validation programs and forces its users to verify the genuineness of their software”.
https://en.wikipedia.org/wiki/Halloween_documents
… the documents identified open-source software, and in particular the Linux operating system, as a major threat to Microsoft’s domination of the software industry, and suggested tactics Microsoft could use to disrupt the progress of open-source software.
How does it compare to PollyMC? It was super easy to use and you can play both offline without an account but also online with a Mojang Account. (Java versions)
Admittedly I didn’t actually try to play it online since I just looked it up for a nephew.
I used the Linux AppImage, just download and run it and you’re good (might have to install new java runtime depending on what you have already), but there’s also Windows and Mac versions.
p.s. I’m not really into Minecraft and don’t know what’s up, but apparently there’s some drama or something and PollyMC (with 2 'L’s) is not to be confused with PolyMC (one ‘L’).