Twitter are gambling that they are now powerful enough to say "No more 3rd party clients", and thus start streaming ads down peoples throats (oh, sorry - "Richer stories" is apparently the nuspeak). I'm not sure they're yet in a position to dictate this, especially given how bad their own clients are compared to some other options.<p>The interesting thing about Twitter compared to e.g. Facebook is that the social graph is very weak. I (and in anecdata, many people I know) use it to follow some "big names", and a splattering of smaller names, for broadcast information. I occasionally send something out, but it's not a strong set of connections. The network effect is thus minimal; migrating over to app.net would be easy, as I'm not <i>that</i> bothered that I have exactly the same followers/followees. When the pain of the service outweighs it's smallish value, I'll just jump ship.<p>Even more people out there are just passive followers of celebrity names. Facebook or similar could launch a "Flitter" that did everything they wanted, and get a mass migration pretty easily - <i>once</i> people get annoyed enough to start looking around. If Twitter continue on this path, that threshold will be reached much sooner than I originally expected.