Every 30 days, you will get three invites. The invites are not cumulative. The invites give them 15 days to register.
If, for some bizarre reason, you run out of invitation codes to give out, then just ask an admin (@COF or myself) for an invitation code.
Either way, open registration is now closed. You, the community, decide who gets to participate.
After some thought, I will not be holding people accountable for the actions of those they invite - unless a pattern of abuse becomes self-evident and demonstrable to the standard of "reasonable person." (Mostly 'cause I'm too lazy to kick and ban people and I really don't like doing so.)
Anyhow, the very top of your page should have a link to invites. You can also click this link:
https://fngt.gq/index.php?action=invite
It's pretty simple and shouldn't need much explaining. You can generate them and hand them out, or you can send 'em to people's email addresses automatically. I'm confident that you'll all understand how the system works, but I'll answer any questions you might have.