The closed registration mode will give every user 10 invitations, that he/she will be able to send out to his friends. This way we will limit the number of users while are polishing up the site and testing its ability to cope with big numbers of visits. If you receive no invitations, you are welcome to leave us your email address and we will send you an invitation as soon as it becomes possible.
In the open registration mode any site guest can register freely. Each user has the possibility of sending invitations, their number will not be limited and sending them out is not a condition for registering.