To play a bit of Devil's advocate... Most of the popular apps fall under the free API access, don't they? If so, isn't it unfair for everyone to say how users need to jump ship and find an alternative? I mean, Twitter is giving you API access for one of the most utilized services on the Internet... for free. You just have to make sure your app follows some guidelines.
People aren't building apps for fun. They're trying to build a business. No one in their right mind is going to invest in a business that's built in an area that can be bulldozed at any moment, and that's what twitter's platform is.
For developers, twitter is now officially a burning platform.
Can you imagine if any other content provider or medium had this restriction? Or even worse, imagine how Twitter's growth would not have occured if the developers were intially subject to these restrictions...
This essentially boils down to "any content sourced from the api must be displayed unmodified, in its entirety, and be properly attributed." It's a pretty standard thing across the entire internet. really, the only strange thing is the insistence that the author's username must be on a separate line from the tweet.
So we have a walled garden network fucking over its users, and you think the solution is to replace it with another walled garden because its rulers are supposedly more benevolent? That's not very ambitious. Think bigger. StatusNet/Identica is free, open source, and (most importantly) federated.
No, i actually think just he's correct. It's OK to be wrong though, so no big deal.
Though I do disagree with his sentiment. I think App.Net is a perfectly good alternative to Twitter and every attempt at open, federated services since the original one (eg www) have failed to catch-on.
The authors of these requirements don't seem to know or care that the World-Wide Web was never intended to mandate one visual-only rendering of your content, and in fact doesn't even do that very effectively. Most of them are pretty reasonable semantics (e.g., @user links to their profile) but as soon as you mention "lines" or "icons" or "top right" you're Doing It Wrong, and no affordances using other services is just blatantly anti-competitive.