| 100% | FORUMS | 6 | Online message boards for discussions and chat |
| 49% | FORUMS | 6 | Message boards, online discussion sites |
| 47% | FORUMS | 6 | Chat rooms, online message boards |
| 44% | SUBREDDIT | 9 | Certain online board for discussion of a topic |
| 42% | FORUM | 5 | Online message board |
| 39% | ADDTOCART | 9 | Message clicked on by an online buyer ... or a hint for 17-, 24-, 39- and 51-Across |
| 38% | MODS | 4 | Message board administrators, for short |
| 36% | IMS | 3 | Chats online, for short |
| 36% | IMING | 5 | Chatting online, for short |
| 36% | IMS | 3 | Online chats, for short |
| 35% | IMS | 3 | Online chat components, for short |
| 35% | IMED | 4 | Chatted with online, for short |
| 34% | EMAIL | 5 | Online message that can also replace 15a, 23a, 32a and 40a |
| 34% | WECHAT | 6 | Online messaging and payment application developed by the Chinese company Tencent |
| 34% | WEBMD | 5 | Online option for health news and information |
| 34% | ETSY | 4 | Online market for handmade arts and crafts |
| 34% | ROOM | 4 | ___ and board (expenses for dorm residents) |
| 34% | IMING | 5 | Chatting online with, for short |
| 34% | DMS | 3 | Private online chats, for short |
| 33% | USENET | 6 | Setting for many early online discussions |
| 33% | CHESSSET | 8 | Board and pieces, including rook, for classic game |
| 33% | IMS | 3 | Sends an online chat message to: Abbr. |
| 32% | SKYPE | 5 | Software for Internet calls and video chats |
| 32% | IMGUR | 5 | Big online site for uploading photos and memes |
| 32% | MORSECODE | 9 | System of dots and dashes for sending messages |
| 32% | EMUSIC | 6 | Online store for tunes and audiobooks |
| 32% | ETSY | 4 | Online market for arts and crafts |
| 32% | WEBSITE | 7 | Online home for content and information |
| 32% | RSS | 3 | Online feed for blogs and podcasts |
| 32% | ETSY | 4 | Online marketplace for arts and crafts |