They did that last year too, but it was for a year. I just checked my account, to make sure I wasn't getting charged full price, and I still have another 2 or 3 months left on my original plan. Even at a dollar a month it's not worth it.
They send me an email every day and I am never opposed to more sports content, so for me, $1 a month is a good deal. To each their own, just wanted to share.
I like it. My membership got renewed for another year for $20 and I was fine with it. I like their writers. Especially for the NFL.