Not sure if i understand your question or not but can you elaborate more on what do you mean by e-commerce capabilities? Do you mean allow user to add advertisement? or do you mean allow user to sell products within EasyBlog?
Hm, EasyBlog does not have such capabilities since it doesn't process payments / products. If you are trying to sell something on your blog, you could just embed html codes from your web shop or any other shop solutions in the blog post.
To be honest I don't think that running a "shop" in EasyBlog is ideal. You could try Hikamarket / Hikashop as they seem to be geared towards web shops.