Got 100 articles. The articles themselves look good. But there is a huge portion of them are duplicated from another site upon checking through G search.
All of duplicated articles I found are from one specific website. So, OP, you may want to add some additional dup check for that specific site.
Now, even if 30 out of 100 articles are unique, it'd be still a good deal as some articles are 1k words or so. And as I don't use these for money sites, I just curate duplicated articles and use them on Tier1 sites.