90% of users are already on the official client (see the link to the announcement in the article) so the "fragmentation" argument doesn't hold water. I'm guessi

90% of users are already on the official client (see the link to the announcement in the article) so the "fragmentation" argument doesn't hold water. I'm guessing this is the nice letter asking devs to stop developing competing client apps and the next letter will be more forceful. Reading between the lines here it looks like their official client is going to be making them money in some capacity so they don't want people using 3rd party clients that might bypass that mechanism (whatever it is: ads, selling click data, whatever). That's just a guess. Also notice their TOS is getting stricter. You cannot display data from alternate services alongside data from Twitter's API. Again, that only seems to make sense from an advertising perspective. Future restrictions are hinted at, too. I used to wonder why the hell companies like Twitter would operate without any solid plans for making a profit, incurring huge costs and just taking on a massive amount of users. In hindsight it looks like you create an awesome free site to get a bazillion users and then once everyone is entrenched you can start to make it suck more in order to get paid.