Given the plethora of content on this site, I find that extremely hard to believe. It still seems self-serving if you post here to get sats, but somehow find no other value to the website.

Sure, that's a possibility. Or maybe they don't find much other content zap-worthy, for whatever reason.

My point is, value contribution can come in many ways

WeAreAllSatoshi

If one doesn't have a hat but has stacked a lot, it suggests they might be greedy, no?

premitive1

nostr

I zap daily minimun 5 posts, avoiding the ones with no HAT, Am I doing it wrong?

I don't think you need a hat (need to zap others) to provide valuable contribution to stacker.news. If you make good comments, or good posts, you will get zaps, which means the pool gets larger. I think that is valuable.