Did the user got deleted?
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No, a deleted user has a gray background as usercard and no reputation and no badges. The user has 3 Unicode characters as username, which is hard to click on:
By zooming in I could find where I had to click, and that way I found the link to his profile: https://unix.stackexchange.com/users/10053/%D8%98%D8%98%D8%98