While logging serial number and some of the basic analytics stats might be attributed to stupidity, I tend to think that using a pretty advanced set of system commands and logging output consistently to log files is very sketchy.

One possible stupid-but-not-malicious explanation is that some anti-cheat company made a sketchy anti-cheat that includes server-side "is CheatEngine.exe running" code, and they're doing that via ps aux... and then this game player app was bullied by some game company into including this anti-cheat library to allow their game to run.