Charges a small fee without revealing it's a subscription service
I paid 99p to get an IQ test result. A few days later, they tried to charge me for a subscription I never knowingly agreed to - I wouldn't have paid the small amount had it been made clear it was a subscription. Thankfully, my bank declined their attempts to take payment as fraudulent and I was able to go to the site and cancel the subscription without having to fight to get my money back.