The description says: "... the first 100 guests who register on our webstore before June 15th will receive even more..." but as far as I can tell, there is no way to know whether 100 people have already signed up or not.
If I only want to go if I also get the bonus stuff, it is a big gamble that I am not sure I am willing to take.
The store item should indicate whether what you are purchasing is a first 100 registration or not.