There are a few uses of twitter that really make a lot of sense - it’s a simple opt-in mass-communication method that facilitates folks like Neil Gaiman or JK Rowling to keep in touch with their fans, and the ability to publicly call out corporations and the like when they screw up in a way that they can’t easily sweep under the rug, or for the mass dissemination of information in a natural disaster situation or events that a repressive government might wish to pretend didn’t actually happen.
I don’t have much use for it myself, but I can easily see it’s applications for others.
