Sometimes, the link leads to a text file containing thousands of email:password pairs. These are not "Skidrow accounts." These are real Ubisoft accounts stolen via data breaches from other websites (a practice called credential stuffing). If a user used the same password for LinkedIn and Uplay, the hacker has both.
Users on Reddit have reported full system encryptions and lost personal data after downloading from untrusted "repack" sites. Uplay Skidrow Account Password