I stream my development almost every day. (Probably will start streaming here in about 15 minutes to tell you the truth) It’s a lot of fun and you meet a lot of cool people. However, I only get around 10 viewers at a time and only 4 of them are active in the chat.
Then I check some other game dev streams and they have around 250 viewers with a fantastic community blowing up the chat. I asked one of the streamers what he was doing right. He said he had no idea and that this was his second stream! So what was I doing wrong considering that the only thing different from his stream and mine was the game we were working on and he had a webcam in the bottom right corner.