article marketing question

I hear you. I very rarely see it "done properly", though.

And the people who imagine that it's ok to curate as much as they want without getting each author's permission are just living in a macabre dream-world in which the "information" comes from people selling curation software/services: they deserve to get their sites taken down (which is exactly what tends to happen, of course, if an author sends their hosting company a DMCA takedown notice by email).

I don't see why not, if you really need it. (For myself, I think website content is generally a bit overrated, compared with email content. It's email content that makes the sales, after all.)

Personally, if I were so short of content that I wanted to get content for my sites from elsewhere, I'd far rather syndicate some high-quality content than curate it. And you don't lose as much traffic that way, clearly. (And even if you want to look at it only in SEO terms - which, of course, I don't - you also have to provide far fewer external links, to do it that way, which doesn't water down the strength of your internal linking structure nearly so much ).

So I wouldn't touch it, myself, to be honest.