I really don't have a clue. This sort of porn comic is not something that's typically measured for popularity. Moreover, it's not a topic that's openly talked about in a proper context.
I have no idea. This kind of pornographic content is not something that's commonly discussed or tracked in a legitimate way.
It's hard to say. Such porn comics are often not in the mainstream and their popularity is difficult to gauge accurately. Also, their existence may not be widely known or openly shared due to their inappropriate nature.