I'm ashamed. Somehow I got signed up to this scam way, way back in October 2010, and I've been paying $11.97 per month ever since, without even knowing I was signed up. That's how closely I (don't) monitor my credit card bill. Of course it averages about $8,000 in new purchases per month, so this charge is easily skipped over, but still, I'm embarrassed that I've missed it for so long. That's an expensive $300 lesson to check my statements a little more carefully.
I never knowingly signed up for this service. Now I will see how easy it is going to be to cancel it. My experience with another scam in the past is that these con artists sometimes don't let go that easily.