Yes. I was a Free-to-Play player. During my time researching my options and whether or not becoming Preferred was worth it, I learned of the offer from Reddit. Here is a link to a discussion about the offer:
http://www.swtor.com/community/showthread.php?t=860854
I made sure to subscribe via the launcher. The free 30 days was what got me to subscribe as I'm not in it for the endgame. I wanted to play the stories with as little restrictions as possible --- as I find this game very restrictive even subbed. Everything you add is designed to get you to make a purchase vie the Cartel Market from extra inventory space to basic amenities offered in other MMOs. But, that is another matter. To be clear, I come to this game after having experienced DCUO, Neverwinter Nights, Lord of the Rings Online, and ESO. I'm not new to MMOs. I also don't know everything about them. I do know that they can reflect the additional 30 days where they show how much subscription time remains.