Those sites doesn't require a payment to see the videos. They are free sites. I am talking about websites which accept payments from its users. It is mandatory for such sites to ask for age verification. Normally, if we make our payments with credit cards, the age verification is not required. But if we are using an anonymous payment method, it might be necessary.
You're right but you should never pay for porn anyway. There's too much of it available for free.
everything is available for free, you know, you just need to find the torrent of it
some paying for it just to help the business going on, other simply because don't care to throw some few pennies into some online stuff