I do not want to discount the possibility of charitable media outlets, but I do think that they are far easier to maintain group cohesion when they are small then when they are large. Once they grow beyond some size (what size specifically I don’t know), I think they are all but certain to fracture, partially, into “groups of groups” with more and more major disagreements between larger and larger subgroups. I am not going to say that it is “impossible” for a charity to run a major news outlet, but by that point I think that they will need to be accepting quite a few large donations from outside sources, which brings us back to questioning their independence.
And I don’t I think said they are illegitimate “if they aren’t trying to sell things”, rather I was trying to say that any large media network is going to need a lot of resources provided by external sources. In the case of Lemmy, that would be all the many instances operated by third parties, who are paying significant hosting fees themselves (and many therefore are asking for donations).
So, if they claim otherwise, that they “don’t take help from anyone”, then unless they are so small that they just pay for everything right out of their own pocket, then I think they are trying to scam people.