NPR was literally created by an act of congress. You can't be honest and say in good faith it's not state affiliated.
> State-financed media organizations with editorial independence, like the BBC in the UK or NPR in the US for example, are not defined as state-affiliated media for the purposes of this policy.
https://help.twitter.com/en/rules-and-policies/state-affilia...
Twitter directly states that the label refers to editorial control, and that even state funded outlets where the state does not exercise editorial control will not get the label (the BBC is explicitly given as an example.)
So, no, your explanation of the labeling logic is not accurate.
So... your point is... congress once gave them a fair chunk of change and now they don't but that doesn't matter because they once gave them a lot of cash. That's like saying my parents still control me because they gave me an allowance in jr. high school.