I believe so, I had no idea what it was or how to get it at the time. But I received it while doing the strike with them.

So, have you seen people get it alone?

Well, to tell you the truth, tonight has been the first time I've been able to get on since tuesday. However, another post I read said that you can get it from picking up an infected player's orb, and killing one in the crucible. I may have picked up an orb since they were pretty good about super use, but I couldn't say for sure. As for a quick answer to your question, no, I have not seen people get it alone, but I have no evidence for or against that idea.