[snarf21]

Yes and no. There are several medium sized publishers that run their own accounts and are active participants in the conversations. It is a slightly different structure because you can meet and talk with them at conventions too but in the end it is a marketing tool to build their audience. Some of the most famous game designers in the world actively communicate with other members all the time. There are also sub-communities of just people who design games or people who follow popular game reviewers, etc. I was just trying to make the point that there are some communities on Twitter but they are self organizing. There are sites like boardgamegeek that are popular too but some of the reddit communities have weird rules like not being able to post that you have a new game coming out.