The add was hidden as what seems to be a necessary step in a confirmation of my flight ticket booking at Whizzair. I had to give my credit card data to complete the confirmation. I fell for it but saw later the reviews of other people that made me realize I was scammed and got subscribed to their service. I logged into their site and saw that I was in the free window of 2 days so was able to cancel the subscription without being charged. All in all this is a shady company with loathsome practices.