Yup, when I was talking with a few different Microsoft representatives, they just straightforwardly stated that they don’t focus at all on punishing or pushing consequences for “obtained/purchased windows instances via any existing alternative/not supported ways” when it comes to private/home users.
They surely and happily will put the idea of buying a key or official upgrade from their certified resellers locally or online on the table.
It is quite a different story with larger organizations and companies.
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Of course all this info is based on just a few talks during the last decade and with incoming subscription (ugh) model a lot will change, I guess.