Tumblr's response: "We're disappointed, man. I thought we were friends."

To our dismay, Twitter has restricted our users’ ability to “Find Twitter Friends” on Tumblr. Given our history of embracing their platform, this is especially upsetting. Our syndication feature is responsible for hundreds of millions of tweets, and we eagerly enabled Twitter Cards across 70 million blogs and 30 billion posts as one of Twitter’s first partners. While we’re delighted by the response to our integrations with Facebook and Gmail, we are truly disappointed by Twitter’s decision.

Wow, when did Twitter become the bad guy?