I discovered today that Scribd charged me, I thought I had cancelled, I don't even used the site. The process of unsubscribing is not transparent and you need to read it carefully otherwise you will gonna end up with a surprise in your bills.
Edit:
Scribd rapidly made a refund, but I recomend you to make more transparent the process of canceling. And although the service is very useful, charge in US Dollars make it very expensive for me that lives in Brazil.
Hi Eder - I'm sorry to hear about your unexpected charge and we're happy to help with a refund. Please send us an email to help@scribd.com. Thank you!