| Clue | Source | Date |
|---|---|---|
| Some list maintainers | ||
| Online posters upset about Liam during end of One Direction | ||
| Spam sources | Newsday | 03 Jan 2016 |
| Senders of cybermessages | Newsday | 21 Dec 2015 |
| Senders of cybermessages | ||
| Online correspondents | ||
| Modern marketing tools | ||
| Online correspondents | ||
| Many correspondents, nowadays | ||
| Modern correspondents |