I also fell victim to the hidden subscription scam. I purchased a $1 course and did not see the fine print at the bottom of the 3rd email saying I was being signed up for a subscription. Of course they don't email you about that when it hits every month so ended up paying for a couple months before realizing I was paying for a subscription I had never used and never (knowingly) signed up for. Long story short, they would not refund my money, even though I've literally never used it, and am going to my credit card company to complain about their predatory, unauthorized billing practices.