I like how you wrote "Recruiting Security Experts Worldwide!!" while it's not really true, as a lot of US-based companies won't even consider hiring you unless you got a green card already and if you pay for your own relocation, then they might hire you. At least, that is how I have seen it was not long ago.
In Sydney on the other hand, they do recruit security experts worldwide, but they also pay for relocation a few of them. (The companies)
Plus, most of these events are almost always in the US too, flying there from Europe, Australia and many other countries costs quite a lot of money, especially for someone in non-security related job or any other job that doesn't pay well.
Just sayin' my thoughts out loud
Thanks for posting about this event Don, not ranting about you, only the event
Edit: Didn't see they're also hosting this event in France, The UK (I guess I saw that too?), Italy (well, they got some hackers down there), Belgium (cool, but why? There's a lot more hackers in Germany), and a few other places in the US.