Perhaps not, but it's not very smart to keep news about your game or franchise hidden away where only the most affluent can hear it. That defeats the point.
I find that difficult to believe that as so very many other companies and conventions can do it without such a side charge. And let's not forget the overall size and scope of Square. They're a multi-billion dollar company with revenue from all over. I find it very hard to believe they need to charge people for this. They're doing it because they can. They're hardly helpless.
