I'm also curious. I assume there's some value as far as Google and social signals - lots of traffic from retweets of your content = relevant, high quality results in the Goog's eyes. But dang, that is a LOT of work to get from where you're starting to the heavy retweet side of the river. A few years ago I busted my butt to try and make Twitter work. The biggest challenge I found was that Twitter is about the conversation. Your stuff gets promoted when you engage with other folks and promote their stuff. It can really feel like being the new kid in school trying to walk right up to the cool kids' table at lunch and get a seat. I honestly think it's the most effortful of the social media platforms and there just weren't design clients out there to justify the time. I made some great professional connections that have helped me grow as a speaker and a writer, but definitely nothing that put money in my pocket.