> Moreover investment of time on user side for newsletter delivering news increases with each newsletter vs One newsletter delivering what I want.
You might be interested in this article[1] and the discussion of subscribed vs. filtered sources. It'd be nice to have a convenient way to assign different priorities to newsletters/content sources. So for a few, you'd get every issue, and for the rest, they'd be combined together in some way.
> You're welcomed to join the discussion on 'Get me the news I need, not the news I want' by explaining what Sample does to address that problem.
I'm not sure I have much insight about needs vs. wants, but you might be interested in The Factual.[2]
[1] https://jacobobryant.com/p/the-pros-and-cons-of-algorithmic/