The biggest thing that doesn't sense to me is the 'two invites per player'. We don't exactly have a flood of newbies so why limit it? It seems unnecessary and may end up turning away some new people simply because the invitee doesn't have enough invites and found some people to join his/her cast in the game.

Then again, in the above scenario, it could be easily abused by having a friend in the game spend their unused invites (because there honestly aren't a lot of newbies joining).

In the end, that seems superfluous, kind of intimidating, easily abused, and may force someone to have to play favorites with their invites.