The intro provides no information now, and the the more time passes the more irrelevant it will be. A variant of “it’s all over the news that Twitter got hacked” would do the same job without commenting on the reader.

The author didn’t even need to rephrase the sentence. Cutting everything up to the first comma would be an instant improvement with zero effort, conveying the same information just as clearly and in less words:

> You probably know that Twitter got “hacked”.