The only difference is that the higher the tier is , the higher the amount of credits needed to enter . This means that people who have yet to complete a certain number of exchanges are unable to join those higher tiers . The idea behind it is that people who have completed more exchanges are more likely to actually send a thoughtful gift . However , there ' s obviously no guarantee that people in higher tiers will actually send a better gift . <| sep |> Yeah , figuring out whether to launch yourself or your enemy would be an interesting choice , but I think it would be a fun choice to have . <| sep |> Well that is one factor . The other , and often larger one , is the intervention in the affairs of their country and disruption of their way of life , in order to secure the raw materials to fuel the above exampled materialism . What you mentioned is more akin to a symptom or secondary consequence of the primary issue of disregard for human life in the pursuit of profit .