I must say YikYak is not something I’ve used, but since SnapChat used to be off limits because of the disappearing pictures, now that The White House has an account, I suppose anything is possible.
I think Twitter can and should be a great live utility. That’s what its best at. I think it has become too cumbersome for chats, and there are better tools now available for that. Granted Twitter is valued at $30 billion, so my guess is that they’re not interested in it as a utility, although that’s what educators use it for mainly. It’s water. It’s electricity.