So far I have owned a Google profile since 2016, and I had no problems until now when I began detecting unusual/bizarre messages in my 'Spam' folder.
This suspects me that operating a social networking account (e.g., Twitter), which I did back in August, also puts your email open to spam. Earlier today I got a weird message in my 'Spam' folder from some stranger with the heading 'BUSINESS INQUIRIES', along with an attachment leading to a Word document. Since I hardly knew Word attachments might contain Macros, I simply deleted it from my Gmail. I have had similar emails, some which have links or otherwise nothing.
For most of us it's hard to tell if each social media platform's user database is not completely secure, i.e., is easily accessible by the general public so that anyone can read and use that information, but not everyone (especially experts) is aware of this since it's basically a myth. However if I knew what would happen after joining a social media platform and were to run into issues related to spam/phishing, then I probably should bring the attention to all.