All these sites are owned by the same people. The main problem with them is that member accounts are strictly bound to the actual subscribers. That is, each account is locked to specific country, region and even ISP the user had when he purchased the subscription, as well as to user's browser. Any changes to these settings require an email confirmation by the original user. Even legit members of the sites often have lots of troubles logging in. The protection renders common cracking techniques useless here. In principle, it can be circumvented, but that takes too much time and effort, so it is just not worth the hassle.