It is alot more stressful for content creators like youtube personalities who tweets out constantly instead of being a consumer. Because you have to make sure you don't miss any import people tweeting at you. And you have to make sure you make your audience happy. Most youtube stars hate twitter because it's such a burden to having to keep up with their audience.
Twitter can't afford to loose these people because they are the ones who create all the tweets most people come to twitter to consume.
Twitter can't afford to loose these people because they are the ones who create all the tweets most people come to twitter to consume.