Yes, unfortunately.. The first time, a huge, noisy ad popped up telling me that my computer had a virus and I needed to call this company. I got really scared and paid them several hundred pounds to fix my computer, before realising they were a scam. Luckily this was on a credit card, so I got all the money back!
The second time wasn't technically a scam, but more just a very misleading website. You could sign up for free video streaming, but in very small writing it said that if you don't cancel your account, you'll pay a whole year's worth of membership up front. I didn't realise this and also, their emails ended up in my SPAM folder, so by the time I saw them, it was too late. The tone of their emails was very rude and threatening, so I'm inclined to think that most of their 'customers' were mislead, like me, and didn't actually want to pay for their service.
Hopefully I've learned my lesson now!