Twitter alters its terms of access to its information, thereby harming the services that built themselves on that information. Which was stupid, because Twitter gets fewer and fewer material benefits from allowing people to use its water. And why would you build a service that relies on a private company’s assets anyway? Facebook changes its terms of access regularly. It’s broken its own Pages system and steadily grows more invasive and desperate. Instagram, now owned by Facebook, just went through its first major change in terms of service. Which went as badly as anyone who’s interacted with Facebook would expect. As Twitter disconnected itself from sharing services like IFTTT, so Instagram disconnected itself from Twitter. Flickr’s experiencing what will probably be a brief renaissance due to having finally built a decent iOS app, but its owners, Yahoo!, are expert in stealing defeat from the jaws of victory. Tumblr seems to me to be spiking in popularity, which coincides neatly with their hiring an advertising sales director away from Groupon, a company described by Techcrunch last year as basically loansharking by any other name.