What is current availability for upgrading/Adding tickets list?

As the title says I'm hoping to finally be able to add another ticket after having to watch games solo, well not really because I have the whole Who Dat Nation with me, the past three years. Can anyone tell me what the current options are looking like? My date is not until later in the week.

In past years I was told tickets became available because people did not renew or failed to pay the whole thing. Does anyone know if this round of tickets includes all of that or is there going to be a second round after the second payment is due? Thanks.