Your stats suggest that while users who land on article pages don't look at many pages, they do stick around long enough to read the article in full.
I'd worry about negative signals if they were bouncing after mere seconds, but not if they're sticking around for 00:01:20 to read the article.
You say there's some interlinking between articles ... how is that being presented?
Make sure it's easy, obvious and inviting for users to read additional articles, or start exploring the ecommerce section.
Here's an insight to dig for: How many of your buyers are return visitors who had their interest piqued in an earlier visit, vs. first-time visitors? Figuring that out might yield some useful insights.