- If you are a native English speaker, please have a look at his comments he made before and after the suspected change of owner. The quality decreased a lot in my opinion which is a strong indicator for hacked / sold accounts.
I'm not a native English speaker but the user definitely "unlearned" the language between Sep 2016 - Nov 2017, no question about that. Plus the lack of spaces after punctuation and some other minor details indicate it's a different person.