[ixm7]

1. Don't count invitations unless the other party actually saw the invitation. In other words, a blocked invitation (tournament is Private) is not an invitation.

2. If both parties to the invitation are marked as mutual friends, never treat invitations as spam.

Also, I understand why you don't want to test permissions on all tournaments as you list them (performance issues).
But how about testing permissions upon double-clicking on a tournament (and disabling the Invite button if an invitation would be blocked). That way, you would avoid "doomed" invitations.

[madhu1955]

Many times, hosts increase the limit at the last moment, that too by a very small number. Players are left with no option but to keep inviting, hoping that partner will respond immediately