There are lots of reasons why a site might get banned, but the main ones are when they are spam or consistently a source of off-topic or low-quality articles.

In this case it's hard to say because 2013 was a long time ago. It might have been because someone was oversubmitting or trying to promote the site on HN. That's another reason why we might ban a site.

This site looks like an online magazine focused on the SF Bay Area. When I look at the submissions I see a penchant for sensational titles and a lot of articles that aren't on topic for HN, but also a few articles that would make good HN submissions, except possibly for the titles. Two examples of good ones:

https://thebolditalic.com/the-remarkable-story-of-the-golden...

https://thebolditalic.com/how-tech-is-deciding-who-gets-to-g... (good article, bad title)

For that category of site, we generally don't ban the domain, but rather downweight it to countervail the sensationalism. I'll switch this one over.