Regarding personal tweets & responses:
Just my personal opinion/experience; but I remember back in day, I would get excited any time there was a new post in the 'Sim Gurus on Twitter' thread, because it usually meant there was new official info or announcements about the game. It was always rewarding to check the thread and see the latest news.
Now the thread is 95% posts about a SimGuru's food, pet or idle thoughts unrelated to the game.
So I'm excited when I see a new post nowadays.
That's just one opinion though. I do like when they retweet builds sometimes. I've downloaded lots for my game because I saw them retweeted here.