Earlier quoted context omitted.
You already have that same deal with bit.ly and friends. http://bit.ly/2saifoB http://bit.ly/2t5xNhB Which is safe and wonderful and which is dangerous?
For the uninitiated: just add a + to the end of any bitly URL to expose metrics and preview the destination. http://bit.ly/2saifoB+ http://bit.ly/2t5xNhB+
This is neat, I hadn't seen it before.