Suppose I work for a large multinational corporation that sells reference management software. Due to my job and previous academic career, I have a lot of experience in managing references. As such, I answer a lot of questions about these topics. Since I have an actual or perceived conflict of interest, I often disclose that I work for the company in my answers.
Disclaimer: I work for Acme Reference Management Corporation.
However, comments are shorter and ephemeral.
Suppose someone asks a question about Acme Reference Manager asking how to do something and complaining about the expensive plugin the company sells to do that. I comment under the question:
I think 50 USD / month is a very reasonable price for the AI-powered Magic Reference Suggestion™ plug-in. The training of the model required accumulating hundreds of thousands of papers and it works amazingly well.
There's barely any room in comments, and discussions may go back and forth.