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Was Unity lying yesterday or are they lying today?
(lemmy.today)
Unity: We have to charge for every install because we only see totals. Also Unity: We can tell which install is which, so you won't be overcharged.
The MAC address is the Ethernet address of a network card endpoint, whether fixed or not. Multiple network cards, multiple MAC addresses. A single network card can also respond to more than one MAC address, or use randomized ones like in the case of your phone. They still tend to come with a factory fixed one, that is just used as a default when nothing else is changing it.
That's... are you sure is what it says? There are MDM managed networks where a router can push an MDM profile to a device, and set its MAC that way, maybe it's something like that?
A graphics card "shouldn't" have a MAC address... unless it has an output which can push Ethernet traffic (FireWire, HDMI HEC, etc.). A bit weird to have a licence locked to the GPU's whatever-port MAC, but possible.