I recently received this email message:
"Dear Colleague,
I trust you are well!
I am writing to propose a mutually beneficial collaboration. I have many research papers that need citations. If you can cite my papers in your publications, I am prepared to offer a thank-you fee.
The papers, authored by different researchers, cover similar research topics, allowing for multiple citations in a single article.
I am excited about the potential for a long-term partnership and look forward to hearing from you.
Warm regards,(name of sender witheld)