For an app that I no longer use, long since deleted and have forgotten about, hearing that there was a security incident that compromised my password is unsettling. I was relieved that I logged in to their app through twitter and my password wasn't store through them.
Same here, at least for the first part. I had used a plain email/password to sign up. After getting this advisory I reset my password and immediately deleted my account.
Nothing against Flipboard, and I appreciate the level of transparency here, but it's annoying to think that I created that account 7 or 8 years ago, haven't touched it since, and it's still there, with the potential to be a liability to me.