The increase wasn't arbitrary. And neither is the initial 140 limit...
Originally, our constraint was 160 (limit of a text) minus username. But we noticed @biz got 1 more than @jack. For fairness, we chose 140. Now texts are unlimited. Also, we realize that 140 isn't fair—there are differences between languages. We're testing the limits. Hello 280!
The increase wasn't arbitrary. And neither is the initial 140 limit...
Originally, our constraint was 160 (limit of a text) minus username. But we noticed @biz got 1 more than @jack. For fairness, we chose 140. Now texts are unlimited. Also, we realize that 140 isn't fair—there are differences between languages. We're testing the limits. Hello 280!
https://twitter.com/biz/status/912783936123691009