I can not stop thinking.
You joined in 2017, a full member with 147 merits so far but you still do not know the forum does not have a marketing team/staff.
A few days ago I caught a member whose account was also created in 2017 in the most common plagiarism
Many possible reasons for this. One that comes to my mind instantly is that it is a bought account. They buy for different purposes and unintentionally do these mistakes. Some get caught finally like the one you noticed.