Hi there,

Indeed.com is a massive site with a solid domain authority (93/100), links, and social metrics - to name a few important factors. And, as a website that posts listings, the duplicate content probably wouldn't be as big of an issue for them in the eyes of search engines as it would be for other types of sites. And, though the content might be pulled from other areas, it is user-generated in a lot of cases which could be treated differently than regular website content entered in through a CMS. The same could be said for similar types of websites in other industries, like Zillow or Amazon.

I am sure others will weigh in but that should help clarify.