"What I meant is that the moderator was not really optimized for mobile as it was built before smartphones became dominant." Actually, we had a new mobile UI

"What I meant is that the moderator was not really optimized for mobile as it was built before smartphones became dominant." Actually, we had a new mobile UI built in ~2010, and tested it at various conferences and in various other products. The truth was the product wasn't going to do well outside of some niches, because the large content providers wanted something they could either control, or that was just more popular even if it wasn't a good fit (IE CNN/et al wanted facebook/twitter for their on-air shows, and were okay with hiring full time people to do curation) So, yeah, mobile didn't really kill moderator, despite your claims.