Online casino names are often short because people find and use them on phones....

https://cleverlynames.com/casino-brand-names-and-the-psychology-behind-how-gambling-platforms-identify-themselves/

Online casino names are often short because people find and use them on phones. A simple name is easier to recall, type, and spell on a small screen. Reviews also shape trust, so a clear name helps people link what they read to the right site.