Though marketed as "see you" now, the origin of .cyou is apparently Chinese, changyou.
"Changyou" means "freedom to explore", and it's a brand under Sohu, which is popular in China in early days of Internet.
"The intention of the Beijing Gamease Age Digital Technology Co., Ltd. (“Cyou”) in filing this application is to proactively protect the ownership of the “Changyou.com” and “Cyou.com” trademark at the Internet Generic Top-Level Domain (gTLD) name space and to provide a trusted, hierarchical and intuitive namespace for registrants and users that use Cyou’s broad range of high-quality entertainment and virtual communities services.
"Changyou" means "freedom to explore", and it's a brand under Sohu, which is popular in China in early days of Internet.
"The intention of the Beijing Gamease Age Digital Technology Co., Ltd. (“Cyou”) in filing this application is to proactively protect the ownership of the “Changyou.com” and “Cyou.com” trademark at the Internet Generic Top-Level Domain (gTLD) name space and to provide a trusted, hierarchical and intuitive namespace for registrants and users that use Cyou’s broad range of high-quality entertainment and virtual communities services.
https://icannwiki.org/.cyou