The free upgrade never ended. It just stopped downloading/installing automatically.Seriously? I didn't know that was still a thing? Is that for as an upgrade or how does that work out?
Source saying it isn't legal?It's not technically legal
There is no clause in any license agreement disallowing the upgrade, directly or indirectly, as far as I've found. It's well documented on third-party websites and Microsoft has not said anything against it. The free upgrade is still performed by techs and enthusiasts every day. Here in Australia, all refurbished computers with Windows 8 licenses are sold with Windows 10 installed (professional refurbishing companies, and they don't use refurb licenses).
I believe Microsoft intentionally allows the upgrade, either because they want more computers upgraded, or because it's a technique that can be used to avoid issues reactivating Windows 10 after reinstall, or because an upgrade process can be used as a repair-install.
My theory is that they 'officially' discontinued the free upgrade to appease their hardware partners, computer OEMs such as HP and Dell that use OS upgrades to drive sales. Microsoft don't actually care themselves.
Not correct. You can still download the ISO, mount it, run setup.exe and upgrade from a currently activated Win7/8 without entering a key. I often use the clean install (nuke/pave) method though, because it's faster than the in-place upgrade process.You cannot upgrade this way, it must be a nuke and pave.