I think the major issue is here is that they are “mirroring” with the same username without clear indicating they are mirrors and they are modifying all the github links in Readme to GitCode. But if you want to claim your project, they want to only comment using the issue section of a project which requires account; but then you have to have a Chinese phone number to register account, and you will automatically get a Huawei Cloud account when you registering it

Edit: also some background info about the company behind GitCode from my other comment: the company behind GitCode is funded and owned by CSDN (China Software Developer Network) and the actual infrastructure and service is provided by Huawei Cloud. On the website they have written this statement in the registration page.

CSDN is mostly a platform to share posts on software development, but it is known to have a lot of issues, including:

1. poor content and directly copied posts from other people without consent, which to a point people is considering the site a content farm; it is even a top blocked site on Kagi;
2. All code provided there requires “coins” to download, even they are open-sourced code; it was reported multiple people in China got scammed via CSDN;
3. You have to login to copy code on the post, and sometimes hides half the post to require you to login to read.