I wonder myself how big media sites like techtarget(com) as example, getting their content? This site owns 150 websites(!), ok they have money to hire journalists and writers, but their daily blog content/news, where they get this? Stealing from RSS without give a shit credit link to the origin source, scraping other sites, from Reuters?
Yes look at bloomberg they dominate google first page with multiple listings from one domain and multiple subdomains (subdomains will harm you in seo?) , yes they have money to get the best seo experts, but I think the site structure has a big seo impact too, they all have content hubs, far beyond normal siloing, hubs with descriptions who linking to the specific category, who has a lot of posts linking back to the category and home page or content hub.
You can learn from these big guys.
Happy Friday!