Some services improve as others degrade. Twitter is now officially sometimes adding tweets to your feed from people/brands you don't follow. This can include retweets of tweets that were favorited but not retweeted. Vine, which popularized the video equivalent of a tweet, is getting more complex in a good way with uploads from one's camera roll and editing. SlideShare, not usually discussed on Hypebot, may be a bit more relevant because they've gone free and added video. But all three fail in corporate communication.