So, to expand on that, at least in US law (and I’d assume elsewhere), if you let people use your trademark for other products and don’t legally challenge it, the trademark can become genericized, which means that you lose the exclusive right to use it.
I don’t know if that was the concern here, but generally, it’s true that there’s an obligation on trademark holders to actively defend their trademarks or lose them.
They are scared of the C64 large amount of users
It looks like they were using the name.
At that point it becomes a trademark protection issue.
So, to expand on that, at least in US law (and I’d assume elsewhere), if you let people use your trademark for other products and don’t legally challenge it, the trademark can become genericized, which means that you lose the exclusive right to use it.
https://en.wikipedia.org/wiki/Generic_trademark
I don’t know if that was the concern here, but generally, it’s true that there’s an obligation on trademark holders to actively defend their trademarks or lose them.