-All users must be ONLINE and be friends with "Project Life M1". That is an account I own and I will try to add you if you aren't already on it's friend list. If you refuse to be a friend of that gamertag you will not get an invite from me.
-Only the hoster of the game should be sending invites out when the lobby is originally being started. Only the person hosting needs to send out invites. It can get annoying to get invites from 3 people when you only need one. After the game has started if you need an invite please send a message to a staff member so they can invite you.
I have had occasions where people I never invited ended up coming into the game and it is really aggrivating. They were either banned, wasn't in the community, or was suspended. It's not the member's responsibility so I don't see why you guys feel obligated to do it.