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 word "duxs" contains only four characters and only one syllable. Single-syllable names are highly rare and exceptionally prestigious. Established brands using one syllable names include Dell, Box and Shell.
This domain was first registered in April 2005. Older domains have an advantage when ranking in search engines.