This four-letter domain is distinctive and easy to pronounce and spell. It sounds like "ducks", which leads to obvious branding opportunities.
As an abstract name this could almost anything, including a physical product (e.g. cleaning, pharmaceutical) website or app (social, health).
The name "duxs" has only four letters and only one syllable. Single-syllable names are extremely rare and very prestigious. One syllable names are used by established brands like Square, Nike and Shell.
This domain was first registered in April 2005. Older domains have an advantage when ranking in search engines.
Duxs.com is a dot com domain. Dot com domains are the most desirable domain extension in the world, famously used by websites like twitter.com. When most people think of a website, they think of a dot com.