I can see that you took note of my commentary on word choice, but you seem to be discounting the idea of charity on the part of whoever runs this hypothetical indie media outlet (see lemmy itself) even as you accept the idea of the audience engaging in charity. Of course, there are scams like PragerU that run at a loss as propaganda outlets, but we can see that they do this by being bankrolled by billionaires.
The idea of a service being “illegitimate” when it is not trying to sell things is bizarre, since your argument seems to lead to the conclusion that “it is outside of the economic framework I have put forward” without explaining the basis for the hypothetical scam.