It's not related to this particular breach, but given this and Uber's other issues, it's not out of the realm of possibility that at some point they had a more serious breach involving loss of password hashes or interception of credentials at login.
(But in all likelihood the poster's account was just compromised through the usual means, otherwise there would be more reports of hacked accounts.)
The article states that this disclosure came out of an board commissioned investigation into the activities of Sullivan’s security team. Do you think that other more serious breaches discovered by this investigation is hidden, or is this more of a general sentiment around how you perceive Uber?
(But in all likelihood the poster's account was just compromised through the usual means, otherwise there would be more reports of hacked accounts.)