@MasTorDon maybe. The issue with that is after registering you'd have to wait to be approved AFTER registration, which I think will discourage people from using the accounts (so we'll end up with lots of unused accounts). Whereas with invites you'd have to wait BEFORE registration, but then have instant access with the invite. So the people that actually use the invite are more likely to then also use the account.
@MasTorDon maybe. The issue with that is after registering you'd have to wait to be approved AFTER registration, which I think will discourage people from using the accounts (so we'll end up with lots of unused accounts). Whereas with invites you'd have to wait BEFORE registration, but then have instant access with the invite. So the people that actually use the invite are more likely to then also use the account.