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).
Duxs has only four characters and only one syllable. Mono-syllable names are extremely rare and extremely prestigious. Examples of one popular syllable names include Dell, Ford and Path.
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 valuable domain extension in the world, famously used by websites like twitter.com. When you own a dot-com, it is much easier to rank for your own name in search engines.