I asked some question and someone answered And then I comment on the answer. And he also comments on my comment. And I comment on his comment, and so on.
Then the following sentence appeared
Please avoid extended discussions in comments. Would you like to automatically move this discussion to chat?
If I click the button then we may be in a chat room.
Here my question is: Who makes the sentence? Does he, who answer to my question, invite me? Or this site, i.e., math.stackexchange.com, reply to them, who give comments, for prohibiting comments?