Don't a lot of these tech thought leaders/social influencers all know each other on Twitter and reply to each other's Tweets? I'm not on much anymore, but that

Don't a lot of these tech thought leaders/social influencers all know each other on Twitter and reply to each other's Tweets? I'm not on much anymore, but that seemed to be what I saw.... I know it's not the same as private chats. But I have to assume there's quite a bit of DMing going on in Twitter?