Thanks for clarifications, Big John.
yes, the free calls are not free but charged at the local number which is "free" for many landline users. I was comparing specific kind of providers (via access number without subscription) but there are different ways of calling abroad including ways from mobile that are better in some ways. I just compared certain type of service.
the initial connection charge is annoying as well as the fact that the time is ticking while you're dialling the number. In addition, some of of the numbers do not work
so you get your connection charge plus a minute only to find out that this access number can't connect you to the country it promises.
by no means those are the best ways to call, but they have their use.